WMAR ABC World News Now August 11, 2011
way to help ground forces who were part of a mission to secure a high-value target when they were shot down. the incident raises questions about whether forces should travel in a helicopter like the chinook. >> the fact that we lost this aircraft is not a decision point as to whether we'll use this aircraft in the future. . >> reporter: the investigation into the crash continues. the military wants to learn from the stint. the fbi is trying to figure out how a pipe bomb ended up on a natural gas line in rural oklahoma. that bomb, complete with a timing mechanism, was removed and th...