CAIRO, Egypt -- An estimated 100,000 chanting protesters crammed Cairo's main stadium Thursday in Egypt's largest demonstration against the U.S. threats of war against Iraq. "We came here because we cannot watch our sisters and brothers being killed in Palestine and about to be killed in Iraq and remain silent," said Safeya Mohamed a 20-year-old student from the Suez Canal city of Ismailia. Rally protesters began arriving at the stadium early Thursday from across the country, yelling chants such as "down with America," waving Iraqi and Palestinian flags and kicking effigies of President Bush.