So many things went wrong last Jan. 29 to contribute to the collision between an airliner and a U.S. Army helicopter that killed 67 people that the National Transportation Safety Board isn’t likely to identify a single cause at its hearing Tuesday. Instead, the investigators will detail all the things they found that played a role in the crash near Washington, and the board will recommend changes that should be made to help prevent a similar event from happening again. Family members of the victims hope those suggestions won’t be ignored the same way many past NTSB recommendations have been after other crashes.
