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
While Ukraine is not a NATO member, alliance members in Eastern and Central Europe fear they could be Russia's next targets, prompting the 28-nation bloc to seek a robust response.
ByJulie Pace, AP White House Correspondent
Confronted by a Kremlin-backed military offensive in Ukraine, President Barack Obama and Western allies will approve plans this week to position at least 4,000 troops and military equipment in Eastern Europe, bolstering NATO's security commitments to nervous member states near the Russian border.