Six Camp Pendleton Marines and another stationed in Arizona killed in helicopter collision near Yuma

SAN DIEGO - Six Camp Pendleton-based Marines and a seventh stationed in Arizona were killed when two helicopters collided during a nighttime training exercise on the outskirts of Marine Corps Air Station Yuma, military officials reported today.

The AH-1W ''Cobra'' and UH-1 ''Huey'' aircraft went down about 8 p.m. Wednesday over a remote part of the Yuma Training Range Complex, according to Marine Corps Air Station Miramar's public affairs office.

No one survived the midair crash, which happened in a section of the installation that extends into the far southeastern reaches of California, near...