Philan-Tam-Duy Le, 35, of Julian, Calif., was taken into custody for “being in possession of the guillotine,” the police said.

© Alex Kent/The New York Times

It was the final, major event planned for the nation’s 250th anniversary celebrations. The president took a lap.

© Alex Kent/The New York Times

It was the final, major event planned for the nation’s 250th anniversary celebrations. The president took a lap.

© Alex Kent/The New York Times

Race preparations have snarled traffic, rerouted flights and forced the National Gallery of Art to conduct vibration tests.

© Alex Kent/The New York Times

The 90,000-square-foot ballroom project has grown in size and scope, with the president’s lawyers saying it is intertwined with the renovation of an underground military bunker.

© Doug Mills/The New York Times

While Customs and Border Protection said it intercepted more than half a ton of the controlled substance, experts say far more of the East African plant makes it into the country.