In a rally organized by CREDO Action, hundreds of Americans today converged outside the Washington, D.C. headquarters of the National Rifle Association, the top gun lobby in the country.

Here are a few pictures from the action, taken by attendees:

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You can follow live updates on the protest by browsing the hashtag #StandDownNRA on Twitter. But you can also help make sure the momentum from today's protest continues by pledging to take action for common sense reforms.

Click here to sign our pledge to call Congress and the White House once a month until common-sense reforms are passed.