A satellite camera captured photos showing the hundreds of thousands of demonstrators gathered in downtown Washington, D.C., on Saturday for the "March for our Lives" rally against gun violence.

A Digital Globe satellite captured the photo over Washington, D.C., around 11 a.m. on Saturday.

satellite image ©2018 DigitalGlobe

satellite image ©2018 DigitalGlobe

Organizers estimated that the rally led by student survivors of the deadly Parkland, Fla., school shooting last month drew a crowd of nearly 800,000 people throughout the day, outpacing original estimates.

The aerial images show a sea of people packed onto Pennsylvania Avenue, the street leading from the Capitol to the White House, causing road closures throughout downtown D.C. along the National Mall.

Other cities across the country including Boston, Chicago, Houston and New York City saw crowds numbering in the tens of thousands marching in protest of gun violence and demanding action on gun laws.

The rally Saturday in D.C. hearkened back to rallies of comparable size in the city held in January 2017 and a year later for the Women's March protesting President TrumpDonald John TrumpGillibrand urges opposition to Kavanaugh: Fight for abortion rights 'is now or never' Trump claims tariffs on foreign nations will rescue US steel industry: report Bannon announces pro-Trump movie, operation team ahead of midterms: report MORE's policies.