BREAKING NEWS UPDATE - "Three Marines and one Navy sailor are dead and one Marine is injured after a helicopter from the Yuma Marine base crashed 20 miles north of Yuma near the Colorado river, according to a military official. The accident involved a search and rescue helicopter that crashed late Thursday afternoon while returning from a routine training flight near the U.S. Army Yuma Proving Ground. The crashed helicopter was one of four in the Headquarters and Headquarters Squadron at Marine Corps Air Station-Yuma. The names of the dead and injured are being withheld for 24 hours until the...