This picture was taken at an Islamic Jihad festival that took place in Damascus over the weekend. It was yet another gathering to honor the anniversary of the death of its founder, Fathi Shakaki.
I'm not great at recognizing faces, but we certainly have Khaled Meshal of Hamas there, as well as Ziad Nakhala of Islamic Jihad. It seems that there are also some PFLP leaders there as well.
That's what I call a target-rich environment!
Just something to keep in mind the next time someone claims that the different terrorist groups hate each other and don't cooperate.