Researching it I found out it also carries blood supplies, which need refrigeration. This is info that was put out during the Obama admin.
It also designed to be a bunker, in case of need. Also, f-16’s have trouble keeping up with it-
Though the details of the plane's defense capabilities are shrouded in secrecy, Air Force One is a military aircraft with the ability to function as a de facto bunker in the event of a nuclear attack and capable repelling airborne missiles should the plane ever come under attack while flying. The plane also has a special electronic defense system that can jam enemy radar.
....
Air Force One has the ability to fly at a speed of over 600 miles per hour (or 92 percent of the speed of sound) -- so fast that F-16 fighter planes escorting the president’s plane while in flight on September 11 had difficulty keeping up and had to ask the plane’s pilot to slow down. Then-pilot Col. Mark Tillman later recalled that the plane was moving at almost supersonic speed.
...
I guess it can also feed up to 100 people at once, so 3000 meals doesn’t sound unreasonable in the event of an emergency-
These days you're lucky to get a bag of peanuts on the average commercial flight. But on Air Force One, the president, flying staff and traveling press are served by two kitchen galleys equipped to feed up to 100 people with carefully prepared food fit for a president. If the president doesn't like what's on the menu, staff keep a supply of groceries on hand to prepare whatever he’s craving.
...
It is also equipped with an emergency room-
Not only does a doctor travel with the president when he flies, but there’s a medical facility on Air Force One that is equipped top act as an operating room in the event of a life-threatening emergency. The facility includes a well-stocked pharmacy and medical tools, operating table and equipment, and for long trips overseas, also carries an extra reserve of the president’s blood type in a refrigerator in the medical annex.
Air Force One: 10 Perks of Flying Like the President
