So we have troops in the area available to help out Morsi but we didn't have any to send to Benghazi. Interesting.
At the time, if memory serves me correctly (it usually does but it has been a very long day), you had both the Spain and Sicily contingents, a spec ops team on exercises in Croatia, certainly at least one ship of the same class as the Kearsage with a full Marine contingent in the Red Sea, the airbases in both Bari and Goia del Colle (Not sure which fighter wings were where though - they rotate pretty frequently), assets and advisors in both Egypt and in Algeria, as well as the security detachment of the embassy in Tripoli.
So, nope. No chance of rescue there.