WASHINGTON, DC - FEBRUARY 21:  Students participate in a protest against gun violence February 21, 2018 on Capitol Hill in Washington, DC. Hundreds of students from a number of Maryland and DC schools walked out of their classrooms and made a trip to the U.S. Capitol and the White House to call for gun legislation, one week after 17 were killed in the latest mass school shooting at Marjory Stoneman Douglas High School in Parkland, Florida.  (Photo by Alex Wong/Getty Images)
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