After the first explosion in Cairo on Friday, supporters of Gen. Abdul-Fattah el-Sisi gathered outside Abdeen Palace. Mohamed Abd El Ghany/Reuters CAIRO — The capital was empty and anxious Saturday morning on the third anniversary of the Egyptian uprising as the residents braced for rival demonstrations for and against the current military-backed government amid renewed fears of violence. Families stayed close to home and some public facilities closed, reeling in the aftermath of four bombings on Friday that killed six people and terrified the city. Ansar Beit al-Maqdis, a Sinai-based militant Islamist group that has raised the banner of armed insurgency against the new government, appeared to claim responsibility for the four bombings, including a powerful car bomb in front of a security headquarters and three smaller attacks on police. By 8 a.m. Saturday morning, another small bomb had exploded near a police training facility but officials said it […]