Huge lines of people, kids in tow, are waiting to get into the Smithsonian's National Museum of Natural History, the world's second-most visited museum.
Right inside the lobby, a cast of the skull of the new Tyrannosaurus rex the museum just acquired is stopping visitors dead in their tracks.
"We wanted to get up here before the exhibit for the dinosaurs closed," says Crystal Epley, who took a three-hour trip from Broadway, Va., to bring her son, John.