Celebrating Fourth of July fireworks

Fireworks were invented in China, and perfected in Italy. But it was immigrants that brought their pyrotechnical secrets to America, creating a Fourth of July tradition: ever-grander fireworks displays. Correspondent Faith Salie visits the New Castle, Pa., fireworks company Pyrotechnico, which will be creating a world-record-worthy Independence Day celebration in Washington, D.C. this July 4th.