Houston police said if it wasn't for several brave customers, a police officer wouldn't have survived a brutal attack inside a Walmart. According to investigators, the Houston Community College police officer was working a second job as a security guard at a Walmart off South Post Oak Road in the Meyerland area. Around 2 a.m. Tuesday, a man wielding a large hunting knife walked up to the female guard and, without warning, attacked. "She was sitting there watching the registers, providing security, when he just walked in and attacked her," said Kese Smith, a public information officer with the Houston...