1.   A downed Black Hawk helicopter is just the beginning of a ghastly urban siege in which the front line moves from street to street.

2.   A check of federal reports showed that the downed helicopter had no record of accidents or incidents, nor had there been reports of problems with its maintenance.

3.   A large helicopter had rigged a sling around the downed Black Hawk helicopter that was heavily damaged in an accident that killed two Rangers, officials said.

4.   Al Ridi said he had once helped the CIA obtain photographs of a downed Russian helicopter.

5.   Already they have taught young Chechens the Afghan technique of stripping the grenade launchers mounted on downed Russian helicopters and sawing down the tubes for hand-held use.

6.   NTSB inspectors also will be examining the wreckage of the downed helicopter to find out exactly what went wrong, said spokesperson Lauren Peduzzi.

7.   A U.S. convoy gets lost trying to help rescue the occupants of the downed helicopter.

8.   And now they also have to look for a potentially downed helicopter and its four-man crew.

9.   Aristizabal said the helicopter carrying the Americans hovered inches above the ground while the remaining Colombian crew of the downed helicopter rushed aboard.

10.   Aristizabal said the helicopter carrying the Americans hovered inches above the ground, while the remaining Colombian crew of the downed helicopter rushed aboard.