The US is rapidly making plans to evacuate Afghans who worked for the American military ahead of September's troop pull-out.<br />'' <br />''Joint Chiefs Chairman Gen Mark Milley said a significant number of interpreters and other employees could be targeted by Taliban militants.<br />'' <br />''As many as 18,000 Afghan nationals have applied for US visas to immigrate to the US under a special programme.<br />'' <br />''In April, President Joe Biden said American troops would leave by 11th September, after 20 years of military involvement in Afghanistan. <br />'' <br />''<span style="color: #222222;">There are at least 2,500 US troops in the country as part of the 9,600-strong Nato Afghan mission.</span><br />