"I greatly appreciate your very swift response, and your organization's work in general. It's a terrific source of authoritative information."
Correction
The May 2012 article “N. Korea Launches Rocket, Kills U.S. Deal” incorrectly said that the second explosion of North Korea’s April 13 launch of an Unha-3 rocket took place about 47 minutes after takeoff. The explosion occurred about eight minutes after takeoff.