WASHINGTON: Before strapping into the cockpit of the US Air Force’s B-2 Spirit stealth bomber for missions that can stretch beyond 40 hours, pilots undergo weeks of preparation that focuses not only on flight plans, but what to eat.

The B-2, a $2 billion flying wing built by Northrop Grumman , played a key role in delivering strikes on Iran’s nuclear sites on Saturday. It demands extraordinary endurance from its two-person crew. That starts with understanding how nutrition affects alertness and digestion during intercontinental flights that can span nearly two full days.

“We go through sleep studies, we actually go through nutritional education to be able to teach each one of us: one, what wakes us up and then what helps us go to sleep,” said retired Lt. Gen. Steve Basham, who flew the B-2 for nine years and retired in 2024 as deputy commander of US European Command.

Pilots are trained to be cognizant of foods and how they slow or speed digestion — critical in an aircraft with a single chemical toilet. Basham’s go-to meal: turkey sandwiches on wheat bread, no cheese. “As bland as you possibly can,” he said.

With a 172-foot (52.4 m) wingspan and stealth profile, the B-2 can fly 6,000 nautical miles without refueling, but most missions require multiple mid-air refuelings. That process becomes increasingly difficult as fatigue sets in.