'No more woe is me': Senator McCain vows quick return to Washington

By Richard Cowan and David SchwartzWASHINGTON/PHOENIX, Ariz. (Reuters) - U.S. Senator John McCain promised on Thursday he would return rapidly to Washington despite his newly diagnosed brain cancer, flashing the fighting spirit that has defined him since he was held in captivity as a Navy pilot during the Vietnam War.McCain, a veteran senator and former Republican presidential candidate known as a strong and sometimes fiercely independent voice on defense and security issues, was found to have a