Naval Power
Sailing the Seven Seas
As many as will physically fit in the fields around Bagram. And on a few carrieres. Hell, our bombers can fly in from Diego Garcia/Guam/Missouri if we need them to. Hell, the carriers alone could do the job.
Another point most people overlook because we aren't physically the largest land forces in the world is the fact that our airforce and never are second to none. The airforce has the most planes, the most operational ready to go planes (which means a lot), our pilots are among the best in the world, and we have more of them than countries with similar training. And that's just the airforce, the USvNavy probably operates the 2nd most capable and powerful air wing in the world after the US airforce. I'd hedge bets that 1 carrier group could topple most countries airforces within a short amount of time with very acceptable losses.