Some say that while Pyongyang's preconditions are unrealistic, its statement provides a noteworthy change in recent tone.
North Korea nuclear talks are possible if the North gives up its nuclear program, Secretary of State John Kerry said this weekend. That's not new, but Kerry's tone has worried some analysts.
Satellite imagery has detected the movement of several Musudan missiles toward the east coast of North Korea, and a test is widely expected. But April 15 is not likely to be the day. Here's why.