BAGRAM AIR BASE - Why does Trump want it back?

American President Donald Trump recently demanded that Afghanistan’s ruling Taliban allow the U.S. to take back Bagram Airfield, the military airfield near the capital city, Kabul. He declared, “BAD THINGS ARE GOING TO HAPPEN” if Afghanistan does not return the base to the U.S.
The Taliban promptly rejected Trump’s demand, though it said it seeks political and economic ties with Washington.