So why did it have a dead power supply?
Did the DoD not think this critical router was worth having a spare power supply on site so they were waiting for Cisco to show up with a replacement? Was it not properly monitored so he only found out it had a dead power supply after? Or did he know had a dead one, but was not authorized to touch it, and whoever who was authorized was not available on site yet?
it doesn't do much good to have redundant hot swap power supplies if you knowingly let a device operate with a dead one. Maybe they need three power supplies to handle such a scenario!