Washington's National Air and Space Museum is closed after demonstrators tried to enter the building with signs and at least one person was pepper-sprayed.
Smithsonian spokesman John Gibbons says a group of demonstrators, estimated between 100 and 200 people, arrived at about 3 p.m. Saturday and tried to enter the free museum.
Gibbons says when a security guard tried to stop them, saying they could not enter with the signs, he was apparently held by demonstrators. A second guard used pepper spray on at least one person and the crowd dispersed. One woman was arrested.
A number of groups have been demonstrating in the city in the past week, including members of Stop The Machine and Occupy D.C., a group modeled on the Occupy Wall Street movement.