1.   The controllers notified several federal agencies, including the North American Aerospace Defense Command, or Norad, which scrambled fighter planes.

2.   France and Britain have sent warships to Antarctic waters and New Zealand plans to scramble surveillance planes to battle a fleet of ships poaching the highly prized Antarctic toothfish.

3.   The airport was closed and the U.S. Air Force scrambled its planes to South Korea and Japan.

4.   The U.S. Air Force scrambled its planes to Korea and Japan.