Four Marines aboard two helicopters were killed in a mid-air crash Wednesday night along the Texas-Mexico border. news_breakingnews.jpg home Deadly Crash superpass.gif http://start.real.com/rd?url=http://smilparse.real.com/showcase/1pubs/channels/abc/abc.smi&adcode=none 10429096205350 ABCNEWS lock_icon.gif superpass.gif http://start.real.com/rd?url=http://smilparse.real.com/showcase/1pubs/channels/cnn/cnn.smi&adcode=none 10429096205351 CNN lock_icon.gif lock_icon.gif big_headline