More than 350 climate activists were arrested March 2 in Washington, DC, after zip-tying themselves to the White House fence.
The civil disobedience action was the highlight of two days of protest, dubbed XL Dissent by organisers, to demand that the Obama administration reject building the Keystone XL pipeline.
The pipeline runs from Canada through the US and will shift oil from tar sands in Canada, which emits more greenhouse gases than conventional oil when burned. The Obama administration is yet to make a decision on allowing a key part of the pipeline to be built.