Top U.S. general reaffirms commitment to Japan amid N.Korea tensions

By Tim KellyTOKYO (Reuters) - The top U.S. general restated Washington's "ironclad commitment" to the security of its close Asian ally, Japan, on Friday amid regional tensions over North Korea, telling his counterpart in Tokyo that "an attack on one is an attack on both of us".Fears about North Korea's missile and nuclear weapons programs have grown in recent weeks.Pyongyang has said it was considering plans to fire missiles over Japan toward the U.S. Pacific territory of Guam, although North Ko