Seven people were killed during anti-government marches on Saturday (local time) while thousands rallied in support of the army-led authorities, underlining Egypt's volatile political fissures three years after the fall of autocrat president Hosni Mubarak. Security forces lobbed teargas and fired in the air to try to prevent demonstrators opposed to the government from reaching Tahrir Square, the symbolic heart of the 2011 uprising that toppled the former air force commander. Instead of commemorating Mubarak's overthrow, a large number of Egyptians gathered in Tahrir to pledge their support for the army chief who ousted the country's first freely-elected president last year. The chanting for...