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In this photo released by the U.S. Navy, the guided-missile destroyer USS Arleigh Burke (DDG 51) launches Tomahawk cruise missiles, in the Arabian Gulf, Tuesday, Sept. 23, 2014.
In this photo released by the U.S. Navy, the guided-missile destroyer USS Arleigh Burke (DDG 51) launches Tomahawk cruise missiles, in the Arabian Gulf, Tuesday, Sept. 23, 2014.

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How effective were Syria strikes?

The U.S. conducted airstrikes against ISIS in Syria, but how will the U.S. determine how successful they were?

How effective were Syria strikes?

The U.S. conducted airstrikes against ISIS in Syria, but how will the U.S. determine how successful they were?