CAIRO, EGYPT - JANUARY 24: Egyptian security officers stand at the scene of a bomb attack at the Cairo Security Directorate building in the Abdeen district on January 24, 2013 in Cairo, Egypt. At least three bombs were detonated across the Egyptian capital Cairo on Friday morning, the largest of which targeted a major security headquarters in central Cairo, killing at least four people and injuring at least 50 according to Egyptian government officials. The attacks come one day before the third anniversary of the January 25, 2011 uprising that caused the overthrow of former Egyptian President Hosni Mubarak. (Photo by Ed Giles/Getty Images).