The U.S. Army is ending its latest effort to build a new armed scout helicopter, known as the Future Attack Reconnaissance Aircraft , an abrupt change of direction that marks one of the department’s most significant program cancellations of the last decade. The service had already spent at least $2 billion on the program and had requested another $5 billion for the next five years, according to budget documents. The helicopter program arrived in 2018 with lofty expectations. Army leaders hoped