Civilians in Gaza sheltered in fear amid constant bombardments targeting residential buildings and communications infrastructure on Monday, as Israeli officials vowed to further tighten a punishing siege of the densely populated enclave. “I can see the plumes of smoke from the bombings through my window,” said Rama Abu Amra, 21, from south of Gaza City. She screamed as the bang of a nearby explosion could be heard. “The bombs are falling all around us, we can’t even tell where they’re hitting. I can even smell the gunpowder now,” said the university student. “It’s so scary. We don’t know what’s happening...