CENTCOM said there have been 26 airstrikes in Syria and 28 in Iraq against the Islamic State since Nov. 28, and that in addition one airstrike near Aleppo targeted al Qaeda’s Khorasan network in Syria. The FBI and the Homeland Security Department warned that Islamic State operatives are planning to target current and former members of the US military within the US. The US and Turkey have been discussing the issue of Syrian border security, including the proposal for a “safe zone.” A US F-16 Fighting Falcon crashed while returning to its base in the Middle East, killing an Air Force pilot.