The original vision system for the KC-46 was beset by troubles such as distorted images, but its replacement also has repeatedly fallen behind.
The Sentinel ICBM program is already alarmingly over budget, and trying to reuse 55-year-old Minuteman III silos would put it even further behind.
The pause comes after 67 people died in January when a passenger jet collided in midair with a Black Hawk helicopter at Reagan airport.
By Tara Copp, AP
The F-16s being shipped to Ukraine lack critical components like an engine and radar, the Air Force said, meaning they cannot be used operationally.
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