Obama conducted a meeting with "foreign policy experts," former government officials, and journalists.
The meeting, of course, is nothing more than round two in the volley of propaganda coming from the White House in its attempt to drum up more support from the American people for direct military intervention in Syria and an open use of U.S. military forces against the secular government of Bashar al-Assad. All of those within an ear's reach of the reports regarding Obama's meeting should be firmly aware that it is nothing more than an attempt to milk the original speech for more propaganda against Assad's Syria and provide a sense of inevitability about the coming conflict there.
With that in mind, Obama stated to those in the "after party" meeting, that if the Syrian government were to shoot down American military planes – American military planes engaging in aggressive air strikes on Syrian soil – then the United States would be forced to "wipe out" Syria's air defenses. Obama also added that an attack against the Syrian air defenses would be a much easier task than attacking his pet ISIS terrorists and other related groups.