Members of the Federal Bureau Of Investigations's (FBI) Hostage Rescue Team (HRT) pictured aboard a Bell 407 helicopter.
The HRT's Tactical Helicopter Unit flies a number of models of helicopter, including the Bell 407.
These helicopters have been adapted for their tactical role.
These modifications include the addition of benches to externally carry HRT operators and points for rigging fast-rope and rapelling systems.
The Bell 407 is a 4-blade, single-engine helicopter that has been on the market since the mid '90s.
HRT 407s may be used in the insertion / extraction role, for airborne reconnaissance and, as shown here, as a platform for HRT marksmen.