Official : Raids are part of recent operations to crack down on al Qaeda in the Arabian Peninsula . U.S. authorities blame the Yemen-based branch of al Qaeda for a string of plots against Americans , including the failed attempt to blow up a U.S.-bound jetliner with a bomb concealed in an operative 's underwear in 2009 . more than 60 suspected al Qaeda 's militants killed Friday , Americans officials say .
Official : Raids are part of recent operations to crack down on al Qaeda in the Arabian Peninsula . more than 60 suspected al Qaeda 's militants killed Friday , Americans officials say .