Obama's best friend forever denied use of base for Foley-Sotloff rescue - was an Israeli base used?

From a lengthy Wall Street Journal article that I received by email on the failed July 3 attempt to rescue US hostages James Foley and Steven Sotloff from ISIS (Hat Tip: Dan F). The two were both subsequently beheaded, with videos posted online.

The U.S. hoped to launch the raid from a base in Turkey that would give easy
access to Raqqa. But the Turks, worried about their own hostages, were