US Army spent billions on a new helicopter that now will never fly

"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."