How Fast Are Police Helicopters? A Look At Average Top Speed
Law enforcement agencies use helicopters for surveillance, tracking, and transportation in traffic-choked cities. How fast ...
来自MSN11 个月
Chicago Police Department adding new helicopter before Democratic National Convention
CHICAGO (CBS) --The Chicago Police Department will add a new helicopter ... a $12 million deal with Bell to buy two single-engine Bell 407 helicopters by the end of the year.