Turkey seizes key highway in Syria, complicating U.S. troop withdrawal

Changes on the ground in Syria are complicating efforts by U.S. troops to withdraw from the region. Meanwhile, President Trump announced he will issue sanctions against Turkish officials after facing a bipartisan backlash in Washington over his decision to pull all U.S. troops from Syria. CBS News National Security Correspondent David Martin joins CBSN with the latest from the Pentagon.