Egypt crisis: McCain and Graham to take part in diplomatic negotiations.

U.S. Senators John McCain and Lindsey Graham arrived in Cairo as diplomatic efforts to end the political crisis in Egypt intensify.

U.S. and European diplomats have been meeting officials from the military-backed government and supporters of ousted President Mohammed Morsi.

Negotiated their place amid tension over plans to install the second mass protest by Morsi sat safe in Cairo.

Government helicopters dropped leaflets calling on people to leave.

Pamphlets, which were left in the square votive Rabaa Al Adawiya protesters would face action if they did not commit a crime, while demonstrating.

Morsi supports over 100 were killed in the clashes since the president was overthrown by the military on July 3.

While the court in Cairo said it would begin trials of Muslim Brotherhood leader Mohammed Badie and two of his deputies on Aug. 25.

Badie said the Brotherhood and several other senior figures were arrested on charges of inciting violence and complicity in the deaths of protesters during a rally against Morsi in July.

Brotherhood spokesman denied charges that a month ago. "Nothing more than an attempt by the police to dismantle the" protest.

Egypt crisis: McCain and Graham to take part in diplomatic negotiations.