KABUL - An American journalist inmate at an Afghan jail block seized by prisoners said Taliban militants held there threatened on Tuesday to behead him and told him he would die if an attempt were made to end the siege by force. Emmy award-winning documentary maker Edward Caraballo, 44, from New York, was one of three Americans jailed in 2004 after being convicted of running a private jail and illegally detaining and torturing men in a freelance war on terror. Speaking by mobile phone from Pul-i-Charkhi jail on the outskirts of Kabul, Caraballo told Reuters he was barricaded in...