WASHINGTON - Two years after the nation's commando forces were given broad authority to attack terrorist networks, the elite units remain hampered by uncertainty over coordination, says the admiral chosen to head the U.S. Special Operations Command. Navy Vice Adm. Eric Olson said that while the command has the lead for "synchronizing" the Bush administration's global war on terror, enforcement of that expanded jurisdiction has been difficult. The command's "ability to drive behavior within (the Defense Department) is limited due to unclear definition of authorities," Olson said in a written response to a question from the Senate Armed Services Committee....