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Has Egypt's revolution failed? And if so, is it the fault of the protesters? Journalist Pakinam Amer is today's guest presenter, and will be asking that question in Cairo.

"It has been a roller coaster of emotions," she says.

"The joy at toppling a dictator that has been ruling by an iron fist for almost three decades has given way to hope, that soon became muddled by fear and doubt as political forces and even voices on the streets became divided, and as the military rulers who took over following former President Hosni Mubarak overstayed their welcome."

If the revolution is over, whose fault is it?