7/3: Police ramp up surveillance in response to terror concerns; man discovers little-known American landmarks
Law enforcement across the country are on alert as the threat of a terror attack looms over the Fourth of July weekend. CBS News correspondent Elaine Quijano shows us how police in New York are preparing; Andy Carroll seeks out places of historical significance that have been forgotten. One of his latest hunts led him to an overlooked place in Baltimore that turned out to have direct ties to America's birth. Steve Hartman has the story.