Better intelligence has made an attack on U.S. or Europe more difficult . Comment: In October 2002 , a suicide attack by a small boat on the French tanker Limburg , off the coast of Yemen , left one crew member dead and 90,000 barrels of oil in the Gulf of Aden . Al Qaeda in the Arabian Peninsula may be a greater threat now , some say . Salafist groups may want to take advantage of instability from recent uprisings .
Better intelligence has made an attack on U.S. or Europe more difficult . Comment: Al Qaeda in the Arabian Peninsula may be a greater threat now , some say . Salafist groups may want to take advantage of instability from recent uprisings .