When Palestinians realize that negotiations imply not getting 100% of what you're asking for. Simple example: they demand all of Gaza, the West Bank and East Jerusalem and unlimited population transfer into Israel. Any time Israel has proposed anything less than that they cry bloody murder and say "Israel is being unreasonable. This is non-negotiable. Israel is holding up peace." Excuse me, but no. Negotiations are about compromise. Israel pulled out of major areas of the West Bank and all of Gaza permanently. What did Palestinians give permanently? Words are meaningless.
U.S. to deliver 8 advanced F-16s to Egypt on July 30-31, U.S. embassy in Cairo says (Reuters)