The now-defunct U.S. plan to train and equip rebel groups was only one of several programs initiated in Syria and was by no means the most important. Washington's efforts in the southern and northeastern parts of the country have proved far more successful, as has the not-so-covert CIA program to equip rebels battling the government of President Bashar al Assad in the northwest. The latter initiative supplied BGM-71 TOW missiles that greatly enhanced the rebel offensive in Idlib province. These advances against loyalist forces have heightened the threat to the Alawite heartland, which was one important factor prompting Russia to intervene in Syria....