Protesters march during a demonstration against the Dakota Access Pipeline on March 10, 2017 in D.C. on March 10. (Photo by Justin Sullivan/Getty Images)

In one of many local demonstrations in recent months, thousands of people gathered this morning in D.C. to protest President Donald Trump’s approval of the Dakota Access and Keystone XL pipelines. The massive crowd of Native Americans, allies, and celebrities began their two-mile walk at the headquarters of the Army Corps of Engineers.

The Washington Post livestreamed the event on Facebook, and TYT Politics posted footage to Youtube.

Former President Barack Obama rejected the Keystone XL Pipeline in November 2015, citing concerns about climate change. The Army Corps of Engineers halted construction on the mostly-built Dakota Access Pipeline in early December 2016.

But in January, President Trump signed executive orders to revive the projects. In February, authorities cleared Oceti Sakowin camp, the main Standing Rock protest site near the Dakota pipeline in Cannon Ball, North Dakota. And on Tuesday, a federal judge declined to temporarily stop construction of the final section of the Dakota pipeline, which means oil can flow as soon as next week.

The Standing Rock Sioux Nation and grassroots Indigenous leaders led today’s march, which was part of a four-day protest organized by Native Nations Rise. On Tuesday, they erected tipis on the National Mall, hosted cultural workshops and panel discussions, and lobbied lawmakers, among other things.

Demonstrators held signs, drummed, and chanted as they marched in downtown D.C. They also stopped to erect a tipi outside of the Trump International Hotel on Pennsylvania Avenue NW.

The march concluded at Lafayette Square across from the White House.