WASHINGTON (WUSA9) — The "March for Our Lives" may have happened two weeks ago, but the movement remains strong.

It has the support of some powerful figures too.

Congressman and civil rights leader John Lewis spoke to more than 100 students and young gun control activists at Friendship Armstrong Elementary in Northwest, D.C. Tuesday afternoon.

Attendees came from schools across D.C. and Marjory Stoneman Douglas High School in Parkland, Fla.

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His message to those students: do not back down.

"I think young people, you have to be impatient," he said. "You want change and you want it now."

Lewis added that age is not a factor when it comes to protest.

"We all can do something," he said. "We all can say something. You're never too young to do something."

Lewis also told students the "March For Our Lives" reminded him of historic "March on Washington" in 1963.