Hundreds of thousands of people came together this weekend to protest under the banner March For Our Lives.
The mass student-led protests called for tighter gun control in America on the back of the February 14 massacre at Marjory Stoneman Douglas High School in Parkland.
The marches follow a 17-minute walkout earlier this month, which students from around 3000 American schools and universities took part in to protest government inaction on preventing school shootings and everyday gun violence.
Half a million people were expected to descend on the biggest march in Washington DC yesterday, making it the largest protest since last year's women's march.
More than 800 sister protests were planned across America, with solidarity marches in London, Edinburgh, Geneva, Sydney and Tokyo.