Run, Hide, Tell? London attack response likely saved lives

College student Vashu Tyagi was leaving his dorm and heading to a nearby bar to celebrate the end of classes Saturday night in London when he saw people running frantically down the street.As three men with large knives moved through the area, stabbing anyone in their path, police yelled at Tyagi and others to get back inside — an order he credits with saving his life."Obviously they gave us good advice," he said. "I'm quite lucky to be here."As reports of stabbings in a popular London nig