NASA building evacuated after reports of gunman

A building at the Johnson Space Center was evacuated Friday after reports of a gunman inside, police said. Space center security officers and Houston police, including a police commando unit, were dispatched to the building, which houses communications equipment and a laboratory. NASA spokesman James Hartsfield said the building was one of the smaller structures on the space center campus, where Mission Control is based. He declined to speculate on how an armed person might have slipped past NASA security.