Former U.S. president Jimmy Carter receives a kiss from his wife Rosalynn Carter after a press conference in Plains, GA, 11 October, 2002 where he talked about receiving the Noble Peace Prize. A commitment to human rights and the alleviation of human suffering was not only a guiding principle of his single, four-year term as 39th president of the United States, but the cornerstone of The Carter Center he founded 20 years ago to pursue his vision of world diplomacy. AFP PHOTO Steve SCHAEFER (Photo credit should read STEVE SCHAEFER/AFP/Getty Images)

NEW YORK, UNITED STATES: Former US President Jimmy Carter (L) waves to the crowd as he sits with his wife, Roslyn (R), at the 1998 Goodwill Games boxing finals 01 August at Madison Square Garden in New York. AFP PHOTO Stan Honda (Photo credit should read STAN HONDA/AFP/Getty Images)

Former US president Jimmy Carter holds an Arabic copy of late Egyptian president Anwar Sadat's autobiography "In Search of Identity" as he sits next to his wife Rosalynn at a polling station in Cairo on May 24, 2012 during the country's second day of landmark presidential election. International monitors with the Carter center monitored the country's first free presidential election. AFP PHOTO/WISSAM SALEH (Photo credit should read WISSAM SALEH/AFP/Getty Images)

Former US President Jimmy Carter (C) and his wife Rosalynn visit the synagogue of the Cuban Jewish Community, in Havana on March 28, 2011. Carter launched a three-day mission in Cuba on Monday aimed at easing tensions with Havana, and raising hopes a jailed US government contractor may be freed. Carter, 86, is visiting the communist-run island at the invitation of the Cuban government for talks to help improve strained relations between Washington and Havana. AFP PHOTO/ADALBERTO ROQUE (Photo credit should read ADALBERTO ROQUE/AFP/Getty Images)

COLUMBUS, GA - OCTOBER 27: (L to R) Georgia Democratic gubernatorial candidate and State Sen. Jason Carter campaigns with his grandparents, former first lady Rosalynn Carter and former U.S. President Jimmy Carter at Emmanuel Christian Community Church on October 27, 2014 in Columbus, Georgia. Jason Carter is running against the Republican incumbent Georgia Republican Gov. Nathan Deal. (Photo by Jessica McGowan/Getty Images)

Former President Jimmy Carter and wife Rosalynn wave to the crowd at the Democratic National Convention 2008 at the Pepsi Center in Denver, Colorado, on August 25, 2008. The Democrats formally opened their convention to crown Barack Obama as the first black presidential election nominee. The DNC is held 25-28 August. The DNC is held 25-28 August. AFP PHOTO Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)

Former US president Jimmy Carter (L) holds a flower next to his wife Rosalynn during a welcoming ceremony as they inspect some of the 32 houses being built for poor families under the Habitat for Humanity campaign at Dong Xa village, in the northern province of Hai Duong on November 18, 2009. The volunteers for Habitat for Humanity will build or repair 166 homes in Cambodia, China, Laos, Thailand and Vietnam on the November 15-20 tour, the Atlanta-based Christian group said. AFP PHOTO/HOANG DINH Nam (Photo credit should read HOANG DINH NAM/AFP/Getty Images)

Former US President Jimmy Carter and First Lady Rosalynn Carter arrive for the Presidential Inauguration of Donald Trump at the US Capitol in Washington, DC, January 20, 2017. / AFP / POOL / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)

Former US president Jimmy Carter and his wife Rosalynn take a break during a housing work project on November 7, 2011 in Leogane, south of Port-au-Prince for victims of the last earthquake of January 12, 2010. AFP PHOTO Thony BELIZAIRE. (Photo credit should read THONY BELIZAIRE/AFP/Getty Images)

Former US president Jimmy Carter (R) and his wife Rosalynn Carter listen to a speaker ahead of a press conference to launch World Habitat Day and the annual Habitat for Humanity Carter Work Project in the District of Columbia October 4, 2010 in the Ivy City neighborhood of Washington, DC. AFP PHOTO/Mandel NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)

Former US President Jimmy Carter and his wife Rosalynn wear pathan turban and glittering garlands presented by the Pakistani tribesmen, look at Pakistan-Afghanistan border at Michini Point on Khyber Pass, on November 03, 1986. The Khyber remains the most important passage between the plains of the Indian subcontinent and the uplands of Central Asia. Between 1985 and 1986, Afghan Mujahideen come together in Pakistan to form alliance against Soviet forces. Half of Afghan population now estimated to be displaced by war, with many fleeing to neighbouring Iran or Pakistan. In 1986, US begins supplying mujahideen with Stinger missiles, enabling them to shoot down Soviet helicopter gunships. AFP PHOTO (Photo credit should read STRINGER/AFP/Getty Images)

ATLANTA - OCTOBER 10: Former President Jimmy Carter and wife Rosalyn converse prior to the start of Game Three of the NLDS of the 2010 MLB Playoffs between the Atlanta Braves and the San Francisco Giants on October 10, 2010 at Turner Field in Atlanta, Georgia. (Photo by Jamie Squire/Getty Images)

Haitian President Rene Preval (R) welcomes former US president Jimmy Carter (C) and his wife Rosalynn Carter (L) on October 9, 2009 in Port-au-Prince. Carter is seeking cooperation between the leaders of Haiti and the neighboring Dominican Republic to rid their shared island of the mosquito-borne malaria. AFP PHOTO / Thony BELIZAIRE (Photo credit should read THONY BELIZAIRE/AFP/Getty Images)

DURBAN, SOUTH AFRICA: Former US President Jimmy Carter (L) and his wife Rosalynn attend 02 June 2002 the start of the Habitat for Humanity -- Jimmy Carter Work Project 2002 at Durban's International Convention Center, where local and international volunteers will build 100 houses for low-income families in Durban. AFP PHOTO RAJESH JANTILAL (Photo credit should read RAJESH JANTILAL/AFP/Getty Images)

Former US President Jimmy Carter is joined by his wife Rosalynn at the Democratic National Convention 26 July 2004, in Boston, Massachusetts. US Democrats opened their four-day national convention in which delegates will formally nominate Senator John Kerry to challenge US President George W. Bush for the White House in the 02 November vote. (Photo credit should read STAN HONDA/AFP/Getty Images)

LOS ANGELES, CA - FEBRUARY 06: Former U.S. President Jimmy Carter (L) and former First Lady Rosalynn Carter attend the 25th anniversary MusiCares 2015 Person Of The Year Gala honoring Bob Dylan at the Los Angeles Convention Center on February 6, 2015 in Los Angeles, California. The annual benefit raises critical funds for MusiCares' Emergency Financial Assistance and Addiction Recovery programs. (Photo by Frazer Harrison/Getty Images)

Former US president Jimmy Carter and his wife Rosalynn arrive at Queen Alia international airport in Amman on April 20, 2008. Carter arrived in Jordan to meet with King Abdullah II as part of his regional tour to promote Mideast peace during which he met with exiled Hamas leader Khaled Meshaal in Damascus. AFP PHOTO/POOL/JAMAL NASRALLAH (Photo credit should read JAMAL NASRALLAH/AFP/Getty Images)

Former US president Jimmy Carter (C) cuts a ribbon as his wife Rosalynn (2nd R), Cambodian Deputy Prime Minister Sok An (L) and his wife (R-name unavailable) look on during a ceremony to inaugurate a new housing project in Oudong, Kandal province, some 50 kilometers north of Phnom Penh on November 21, 2009. The volunteers for Habitat for Humanity will build or repair 166 homes in Cambodia, China, Laos, Thailand and Vietnam during a November 15-20 tour, the Atlanta-based Christian group said. AFP PHOTO/TANG CHHIN SOTHY (Photo credit should read TANG CHHIN SOTHY/AFP/Getty Images)

Former US president Jimmy Carter (2nd L) waves with his wife Rosalynn (C), Cambodian Deputy Prime Minister Sok An (R) and his wife (2nd R-name unavailable) as they pose for a picture during a ceremony to inaugurate a new housing project in Oudong, Kandal province, some 50 kilometers north of Phnom Penh on November 21, 2009. The volunteers for Habitat for Humanity will build or repair 166 homes in Cambodia, China, Laos, Thailand and Vietnam during a November 15-20 tour, the Atlanta-based Christian group said. AFP PHOTO/TANG CHHIN SOTHY (Photo credit should read TANG CHHIN SOTHY/AFP/Getty Images)

Former US president Jimmy Carter and wife Rosalynn Carter help build a house as they visit the construction site of houses being built by Carter's Habitat for Humanity foundation for victims of the January 2010 earthquake in Leogane, 33km south of Port-au-Prince, on November 26, 2012. AFP PHOTO Thony BELIZAIRE (Photo credit should read THONY BELIZAIRE/AFP/Getty Images)

ATLANTA, GA - SEPTEMBER 17: Former President Jimmy Carter and his wife Rosalynn look on prior to the game between the Atlanta Braves and the Toronto Blue Jays at Turner Field on September 17, 2015 in Atlanta, Georgia. (Photo by Kevin C. Cox/Getty Images)

DENVER - AUGUST 25: Former U.S. President Jimmy Carter (R) and former first lady Rosalynn Carter wave on stage during day one of the Democratic National Convention (DNC) at the Pepsi Center August 25, 2008 in Denver, Colorado. The DNC, where U.S. Sen. Barack Obama (D-IL) will be officially nominated as the Democratic candidate for U.S. president, starts today and finishes August 28th. (Photo by Mark Wilson/Getty Images)

BEIJING, CHINA - SEPTEMBER 9: Former U.S. President Jimmy Carter and his wife Rosalynn arrive at Peking Univesity for his talk with students about democracy on September 9, 2003 in Beijing, China. Carter's foundation, the Carter Centre, has provided assistance and advice in standardizing electoral and governmental procedures in China's village elections for the last six years. Carter is currently on a tour to promote democracy in China and it was under his governance in 1979 that the U.S. and China established full diplomatic relations. (Photo by Getty Images)