Could have been this...
A top-secret weapon being developed by the US military was destroyed four seconds after its launch from a test range in Alaska early on Monday after controllers detected a problem with the system, the Pentagon said. The Advanced Hypersonic Weapon is part of a program to create a missile that will destroy targets anywhere on Earth within an hour - traveling at speeds in excess of 3,500 miles-an-hour or Mach 5. The mission was aborted to ensure public safety, and no one was injured in the incident, which occurred shortly after 4 am EDT at the Kodiak Launch Complex in Alaska, said Maureen Schumann, a spokeswoman for the U.S. Defense Department.