U.S. Navy bases across Japan were busy Wednesday as the United States prepares to retaliate for last week's terrorist attacks in New York and Washington.

The 8,422-ton guided-missile destroyer Curtis Wilbur returned to Yokosuka naval base in Kanagawa Prefecture after departing Monday on an undisclosed mission.

U.S. Navy officials declined to comment on the warship's earlier departure, which was followed by the 9,407-ton missile cruiser Vincennes. Both vessels are equipped to carry Tomahawk cruise missiles as well as antiaircraft missiles and antisubmarine weapons.