NBC News and news services report:
Washington's National Air and Space Museum was closed Saturday afternoon after sign-wielding demonstrators tried to storm the building on the National Mall.

Jose Luis Magana / AP
Demonstrators march through the streets of Washington on Oct. 8, as part of Occupy DC activities in Washington.
At least one person was pepper sprayed when the crowd pinned a guard against a wall and another guard came to his rescue, Smithsonian spokesperson Linda St. Thomas told NBC station WRC.
"You cannot bring that stuff in the museum under any circumstances," St. Thomas told WRC.
It was not immediately clear if the protesters were affiliated with the Occupy DC protest that sprung up last week as an offshoot of the larger Occupy Wall Street movement in New York.
Read more here and meet some of the protesters from New York and Seattle.

Jose Luis Magana / AP
A demonstrator lies on the ground at an entrance to the National Air and Space Museum in Washington after police pepper-sprayed a group of protestors trying to get into the museum on Oct. 8, as part of Occupy DC activities in Washington.

Henny Ray Abrams / AP
Occupy Wall Street protesters gather in Washington Square Park, Oct. 8, in New York. The Occupy Wall Street movement started in New York City last month and is spreading to other parts of the country.

AP; Zuma24.com
Left: Cherie Walters, 58, from Mount Clemens, Mich., poses for a photograph, in New York, Oct. 7. Walters, who has participated in Occupy Wall Street protests, is wearing the shirt she wore to two of the protests. Right: A protestor holds a placard with ''Middle class, Middle aged, Also Angry'' during the ''Occupy D.C.'' movement at the Freedom Plaza. Inspired by ''Occupy Wall Street'' movement in New York, activists in Washington continued the ''Occupy D.C.'' movement on its third day.

David Kohl / AP
Protesters march through downtown Cincinnati during the Occupy Cincinnati protest, Oct. 8. The Occupy Wall Street movement started in New York City last month and is spreading to other parts of the country.


Occupy Denver was huge today. At least 1,000 people. Denvers Channel 7 News was there. Towards the end I called Channel 4 and they said they were on their way. They asked exactly which streets we were crossing and said they were almost there. I never saw them. Channel 9's phones just rang and rang. The cold and rain may have kept most people away but a large amount of people did come out. I hope the media post this crowd of people of all ages coming out to show their solidarity.
Tell your friends to post this image in their windows to support Occupy Wall Street, even if they cannot come to an event.
Occupy Portland! Thursday between 5-6,000 people marched through downtown. I have seen no coverage of that event beyond local news. What gives?
And your media organizations are owned by whom?