Post-Apocalyptic-Era

There wasn't a single sound among the ruins of the town except for the near silent footsteps of two children. These children were brother and sister, the brother was older, he was pretty sure he was around 18 years old. The sister had just turned 7 the week prior, and she was still just a child. They wore backpacks filled to the brim with things they needed: food, medical supplies, tape, water, other assorted things and ammunition. All these things were meticulously placed in the bags so they would make as little sound as possible. The brother carried a rifle, which he had duct taped a sawn-off shot gun to the underside of it as a last resort, he kept it loaded at all times. As the two of them silently made their way through the desolate town the brother slowed and then held up his hand. The two of them stopped simultaneously as if they were trained soldiers. He turned to his sister and knelt down in front of her, "We're going to go in that building over there and get supplies, got