WASHINGTON (AP) Americas 20-year war in Afghanistan entered its final hours Monday with the last Americans seeking to be evacuated and the U.S. military preparing to end its airlift and depart the Taliban-controlled capital.

Obviously we are reaching the end of our prescribed mission, Maj. Gen. Hank Taylor of the Pentagons Joint Staff told reporters, adding that details of the final evacuation movements were being kept secret for security reasons.

Speaking at the same news conference, Pentagon spokesman John Kirby said it was not too late for any remaining Americans to get to the Kabul airport for evacuation flights.

There is still time, Kirby said.

Later, White House press secretary Jen Psaki said a small number of Americans were believed to still want to get out of the country. She did not offer an exact number but said about 6,000 had been evacuated by various means so far. She said some of the remaining Americans had not fully decided whether to leave.