AL RUKBAN REFUGEE CAMP — Some 80,000 people are trapped in a scrub land of hopelessness in a forgotten corner of the Middle East. NBC News was given unique access to the area where Rukban straddles a rocky, arid no man's land along the border linking Syria and Jordan — an important American ally, and a key member of the U.S.-led coalition against ISIS. The sea of tattered tents, the barefoot women and begging children, along with the burn victims being treated nearby at Rukban are all proof that the desperate crisis is beyond the reach of aid workers. Last...