UPDATE 9:34 a.m.:
Protesters climbing a 270-foot crane at a Washington, D.C., construction site are associated with Greenpeace.
Capt. Robert Glover of the Metropolitan Police Department said authorities believe the protesters are conducting a First Amendment action, our affiliate WJLA reported.
Greenpeace "uses peaceful protest and creative communication to expose global environmental problems," according to its website Greenpeace.org.
They are hanging a 70 by 35 foot banner that says "Resist."
The protest comes a day after the President Trump's administration delayed implementation of at least 30 environmental rules and froze new Environmental Protection Agency contracts and grants.