WASHINGTON — The United States raised concerns with the United Arab Emirates seven years ago about possible ties between officials in that country and Usama bin Laden, according to a section of the Sept. 11 commission's report that details a possible missed opportunity to kill the Al Qaeda leader. Republicans and Democrats alike are raising concerns this week about the Bush administration's decision to let a UAE-operated company take over operations at six American ports, in part citing ties the Sept. 11 hijackers had to the Persian Gulf country. President Bush has called the UAE a close partner on the...