Deliveries of the new engine the Army says will power its next-generation attack helicopter are delayed until the spring because of supply chain issues, the Army said Friday. A top Army aviation official said earlier this year that he expected engines from the Improved Turbine Engine Program to be delivered for use in Future Attack Reconnaissance Aircraft helicopter prototypes in November. On Friday, however, hopes that the Army, and General Electric, which makes the engines, would hit that target, were...