Egyptians extinguish a burning police vehicle, which has been set afire by angry protesters in Tahrir Square, once the epicenter of protests against former President Mubarak, in Cairo, Egypt, Monday, March 18, 2013. Egypt is currently mired in another wave of protests, clashes and unrest that have plagued the country since the ouster of authoritarian leader Hosni Mubarak in the pro-democracy uprising two years ago.