The Egyptian Army has moved "decisively on the side of the [anti-government] protesters" according to a retired general in Cairo.
Correspondent Jon Leyne spoke to the retired general who is in close contact with the tank crews policing the protests in Tarhir Square.
He was told that the Egyptian army was now willing to open fire on violent pro-government protesters and predicted that President Mubarak would be out of power by tomorrow.
US Under Secretary of State Nicholas Burns told John Humphrys that the "massive US aid programme" that supports the Egyptian military would be used as a tool to persuade President Mubarak to listen.
"The military is going to be the institution that defines this crisis," he said.
"I continue to believe that President Mubarak's days as leader are probably numbered".
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