Collision
[DOC] [TLE] Cause of helicopter collision that killed 12 Marines off Hawaii ... [PAR] 4 days ago ... HONOLULU - The cause of a collision between two helicopters off Hawaii that 
killed 12 Marines in January was revealed to be a combination... [DOC] [TLE] Collision Synonyms, Collision Antonyms | Thesaurus.com [PAR] Synonyms for collision at Thesaurus.com with free online thesaurus, antonyms, 
and definitions.