U.S. military bases in Japan are stepping up activity as the United States prepares to retaliate for the devastating terrorist attacks last week in New York and Washington.

The guided-missile destroyer USS Curtis Wilbur deaprts from Yokosuka naval base.

At 8:30 a.m. Monday, the 8,422-ton, guided-missile destroyer USS Curtis Wilbur left the naval base in Yokosuka, Kanagawa Prefecture. About 30 minutes later, the 9,407-ton guided-missile cruiser Vincennes put out to sea.