Turkey's Prime Minister Recep Tayyip Erdogan (R) talks with Afghan President Hamid Karzai before a meeting as part of the Turkey-Afghanistan-Pakistan Fifth Trilateral Summit in Istanbul December 24, 2010. Osman Orsal/Reuters
Turkey's Prime Minister Recep Tayyip Erdogan (R) shakes hand with Pakistan's President Asif Ali Zardari during a meeting as part of the Turkey-Afghanistan-Pakistan Fifth Trilateral Summit in Istanbul December 24, 2010. Osman Orsal /Reuters
Turkey's Prime Minister Recep Tayyip Erdogan, left, and Iranian President Mahmoud Ahmedinejad pose for cameras before a meeting in Istanbul, Turkey, Wednesday, Dec. 22, 2010. AP
Turkish Prime Minister Recep Tayyip Erdogan, left, and his Syrian counterpart Naji al-Otari, center, inspect a military guard of honour during a ceremony before their talks in Ankara, Turkey, Tuesday, Dec. 21, 2010. Erdogan and al-Otari chaired a meeting of their countries' ministers aimed at boosting their trade and cooperation. Burhan Ozbilici/AP
Turkey's Prime Minister Recep Tayyip Erdogan (R) and Palestinian President Mahmoud Abbas meet in Ankara December 5, 2010. Adem Altan/Reuters
Turkey's Prime Minister Tayyip Erdogan (R) gestures as he welcomes Azerbaijan's President Ilham Aliyev in his office in Istanbul December 22, 2010. Tolga Bozoglu/Reuters
Greek Prime Minister George Papandreou (l) and his Turkish counterpart Recep Tayyip Erdogan during a ceremony for the 2011 Winter Universiade, or Winter University Games, an Olympic-style event that will take place later this month in the eastern city of Erzurum, Turkey, Friday, Jan. 7, 2011. AP
Egypt's President Abdel-Fattah el-Sissi called it a 'terrorist attack' on soldiers defending the country's borders that will 'not go unanswered.'
BySarah El Deeb, Associated Press
Al Youm Al Saabi Newspaper/Reuters
Gunmen armed with rocket-propelled grenades attacked a border guard post Saturday in Egypt's western desert in a brazen assault that killed 21 troops deployed in the province along the border with neighboring Libya.