WASHINGTON — The one-two-three punch of American and Arab airstrikes against Islamic State militants in Syria and Iraq was just the beginning, President Barack Obama and other leaders declared Tuesday. They promised a sustained campaign showcasing a rare U.S.-Arab partnership aimed at Muslim extremists. At the same time, in fresh evidence of how the terrorist threat continues to expand and mutate, the U.S. on its own struck a new al-Qaida cell that the Pentagon said was "nearing the execution phase" of a direct attack on the U.S. or Europe.
Airstrikes in Syria and Iraq are just the start


Sign up for the Herald's free e-newsletter