One of the senior leaders of the al-Qaeda network has reportedly been captured and is now said to be in American hands. The suspect, who US government sources say was caught in the past few weeks, has not been named. "I can't tell you when, I can't tell you where, I can't tell you how," said one unnamed official. "But this is a big deal." The sources said an operation was under way to get the person arrested out of the country where he is currently being held by US forces to a place where he can be interrogated.