Civilians in Homs, Syria, left for a safer part of the city Sunday. Despite a cease-fire, aid convoys were attacked over the weekend. Bassel Tawil/Agence France-Presse — Getty Images ANTAKYA, Turkey — A three-day humanitarian cease-fire in the Syrian city of Homs was supposed to be a small breakthrough, a moment of relief for civilians trapped in a grim civil war. But mortar rounds and gunfire struck near aid convoys, damaging vehicles and leaving victims lying in the streets. Snipers fired on civilians as they fled their besieged neighborhood. Others refused to leave, fearing a massacre of those left behind. Limited food made it in, and some of the nearly 700 people who reached safety said they had been surviving on one meal a day and that some of their neighbors had resorted to eating grass. Though few expect the international peace talks that resume in Geneva on Monday […]