In this Monday, Jan. 28, 2013, photo, Egyptian protesters use camera phones to capture a burning state security armored vehicle that demonstrators commandeered during clashes with security forces nearby and brought to Tahrir Square and set it alight, in Cairo, Egypt. On Tuesday, Jan. 29, 2013. Egypt's army chief warns of "the collapse of the state" if political crisis continues. (AP Photo/Mostafa El Shemy)

Photo by: Mostafa El Shemy

In this Monday, Jan. 28, 2013, photo, Egyptian protesters use camera phones to capture a burning state security armored vehicle that demonstrators commandeered during clashes with security forces nearby and brought to Tahrir Square and set it alight, in Cairo, Egypt. On Tuesday, Jan. 29, 2013. Egypt's army chief warns of "the collapse of the state" if political crisis continues. (AP Photo/Mostafa El Shemy)