Watch Live: Pentagon briefing as last U.S. troops leave Afghanistan

Defense Department spokesman John Kirby and U.S. Central Command commander General Kenneth F. McKenzie are holding a briefing Monday as the deadline arrives in Afghanistan for U.S. troops to leave the country.  U.S. officials said that the last American planes have now left. What: Defense Department spokesman John Kirby and U.S. Central Command commander General Kenneth F. McKenzie hold a briefing Date: Monday, August 30 Time: 4:30 p.m. Location:  The Pentagon – Arlington, Virginia Online stream: Live on CBSN in the player above and on your mobile or streaming device. 

Earlier Monday, Kirby would not elaborate if the gates to Kabul's airport were closed, but said there was "still time" for U.S. citizens to evacuate. The State Department said it is in touch with U.S. citizens who remain in Afghanistan.