FLAGSTAFF, Ariz. (AP) — The sightseeing helicopter that crashed at the Grand Canyon, killing three British tourists, was not required to have a system that would keep it from bursting into flames on impact, U.S. authorities said.
Source: World Business
 — The sightseeing helicopter that crashed at the Grand Canyon, killing three British tourists, was not required to have a system that would keep it from bursting…){kind=link}