From NPR News in Washington, I'm Korva Coleman.Afghanistan President Hamid Karzaiis claiming the United States is working with the Talibanin an effort to keep U.S. troops in Afghanistan.He says the U.S. and militants are scaring Afghans into believing violence will get worse if foreign troops leave.The top U.S. commander in Afghanistan says Karzai allegation is "categorically faults".The number of refugees in Syria is already passed the one million marks,but this number could double or even triple by the end of 2013according to the U.N.'s Refugee Cheif Antonio Guterres.He was speaking in Turkey and warned a regional explosion if the Syrian conflict does not end.NPR's Daborah Amos reports from Gaziantep.The sharp warning of an even larger refugee crisis by year's end,comes as the numbers of Syrians fleeing the country is raising dramatically.An average of 8,000 civilians cross border everyday.In Jordan, a refugee camp housing more than 100,000 is now the forth largest city in the country.In Lebanon, the projected rise of refugee numbers would make Syrians one quarter of Lebanon's population.New reports of Syrian government air strike on the north central city of Raqqahcould drive up refugee numbers in Turkey.Rebels captured Raqqa a week ago, a provincial capitalwhere more than a million displaced Syrians had found shelter.Daborah Amos, NPR News, Gaziantep.President Obama could announce as early as tomorrow, his latest cabinet pick.