Amid this activity , in November and December 1999 , Mohamed Atta , Marwan al-Shehhi , Ziad Jarrah and Nawaf al-Hazmi visited Afghanistan , where they were selected for the " planes operation " that was to become known as 9/11 . Al-Hazmi undertook guerrilla training at al-Qaeda 's Mes Aynak camp ( along with two Yemenis who were unable to get US entry visas ) . The camp was located in an abandoned Russian copper mine near Kabul , and was for a time in 1999 the only such training camp in operation . Atta , al-Shehhi and Jarrah met Muhammad Atef and bin Laden in Kandahar , and were instructed to go back to Germany to undertake pilot training
planes operation
September 11 attacks
Bin Laden Issue Station