North Korea's claim that it successfully tested a hydrogen bomb set off international alarm bells, but can Pyongyang's claim be trusted?
The announcement was a message from Kim Jong Un who wants to cement his status at home as a leader while simultaneously showing the outside world that Pyongyang is a force to be reckoned with, according to analysts.
The country is believed to have a handful of nuclear warheads and has carried out three previous nuclear tests since 2006. That doesn't mean North Korea is all the way there: Pyongyang lacks the missile technology to launch those weapons long distances, according to Western officials and experts.
U.S. & World
Stories that affect your life across the U.S. and around the world.
If authentic, Wednesday's test would mark the first North Korean nuclear test involving a hydrogen bomb. However, experts say North Korea has a tendency to exaggerate its nuclear prowess and lacks the technological capability to produce a hydrogen bomb.
The U.S. should still be worried. North Korea could acquire that capability within the next few years, one expert said.