Vice Adm. Shoshana Chatfield represented the U.S. in NATO's Military Commission, the alliance's leading military board.
Maj. Gen. Curtis Taylor, commanding general of the 1st Armored Division, said it would be a “long and difficult recovery operation.”
Republican leaders are concerned about rumored plans to scale back American military involvement in Europe and Japan.
The bombers also flew over Sweden's parliament to mark the anniversary of the country joining NATO.
