NATO: Al Qaeda #2 killed in Afghanistan (AP) KABUL, Afghanistan - The U.S.-led NATO force in Afghanistan killed al Qaeda's second-highest leader in the country in an airstrike in eastern Kunar province, the coalition said Tuesday. Sakhr al-Taifi, also known as Mushtaq and Nasim, was responsible for commanding foreign insurgents in Afghanistan and directing attacks against NATO and Afghan forces, the alliance said. He frequently traveled between Afghanistan and Pakistan, carrying out commands from senior al Qaeda leadership and ferrying in weapons and fighters. The airstrike that killed al-Taifi and another al Qaeda militant took place Sunday in Kunar's Watahpur district, the coalition said. A follow-on assessment of the area determined that no civilians were harmed, it said. The coalition declined to reveal the name of al Qaeda's top leader in Afghanistan "due to ongoing operations and security concerns." Special operations in golden age under Obama Sgt. Bowe Bergdahl's father promises prisoner-of-war son "will come home" Afghan official: NATO strike kills 8 civilians The U.S.-led invasion of Afghanistan was carried out because al Qaeda chief Osama bin Laden used the country as his base to plan the Sept. 11, 2001, attacks in New York and Washington. Most of al Qaeda's senior leaders are now believed to be based in Pakistan, where they fled following the U.S. invasion. The terrorist organization is believed to have only a nominal presence in Afghanistan. Many senior al Qaeda commanders have died in U.S. drone attacks in Pakistan's northwest tribal region, and bin Laden was killed by U.S. commandos in the Pakistani town of Abbottabad last May. Bin Laden advised al Qaeda militants to leave Pakistan's North and South Waziristan tribal areas because of the threat of drone attacks, according to letters seized from the compound where he was killed. The documents were later released by the U.S. In one of the letters, bin Laden recommended they go to Afghanistan's Kunar province because of "its rougher terrain; too many mountains, rivers, and trees that can accommodate hundreds of brothers without being spotted by the enemy," according to the Combating Terrorism Center at West Point, which published the documents. Elsewhere in Afghanistan, two would-be suicide bombers riding in a vehicle packed with explosives in eastern Nangarhar province were killed when the vehicle exploded prematurely, said a local government official, Shakrulla. Three others in the vehicle were severely wounded. The explosion occurred on the main highway between Jalalabad city and Torkham, a town on the Pakistani border.