Environmentalists sue to protect whales from Navy sonar
Intense sound waves caused by the Navy's use of sonar can harm or kill endangered marine animals such as the killer whale and the blue whale.

SONAR: In 2008, the U.S. Supreme Court sided with the Navy, ruling that sonar training exercises off the Southern California coast could be conducted without restrictions designed to protect marine life, in a defeat for environmentalists. (Photo: Wikimedia Commons)





















