Is North Korea preparing to mark the 110th anniversary of its founder’s birth with a literal bang in the form of a powerful missile or nuclear test?

Maybe, the U.S. special envoy to Pyongyang said Wednesday.

"I think it could be another missile launch, it could be a nuclear test," Kim Sung said in response to a question about what could be in store on the April 15 anniversary, known as the Day of the Sun — the North’s most important holiday.