Marjory Stoneman Douglas High School

Thousands of protesters have swarmed into the US capital and cities across the world to march for gun control and ignite political activism among the young.

US students spilled out of classrooms by the tens of thousands on Wednesday, chanting slogans like "No more silence" and "We want change" as part of a coast-to-coast protest over gun violence prompted by last month's massacre at a Florida high school.

Students galvanized by the deadly mass shooting at a Florida high school confronted lawmakers on Wednesday with demands to restrict sales of assault rifles, while President Donald Trump suggested arming teachers as a way to stop more U.S. rampages.