Here's a timeline on North Korea's missile tests in 2017:
The North conducts a successful launch of the new Pukguksong-2 intermediate range missile that travels 310 miles.
Four medium-range missiles were launched from a test site near North Korea’s border with China. Some flew about 620 miles, landing about 185 miles off the coast of Japan.
A mobile launched missile exploded seconds after launching.
A KN-17 missile was launched but landed in the Sea of Japan after traveling only 34 miles.
Another missile explodes shortly after its launch.
A KN-17 missile traveled 21 miles, breaking up in midair.
North Korea launches a missile that flies for 30 minutes and 435 miles, reaching an unusually high altitude of about 1,200 miles, before landing in the Sea of Japan.