Donald Trump took to the rally-like atmosphere of Capital One Arena to sign a series of executive orders, including one that withdraws from the Paris Climate Accords and others that freeze much of non-military federal hiring and new regulations.

The move announced Monday is a blow to worldwide efforts to combat global warming and distances the nation from its closest allies.

Under the U.N. rules at the time, the U.S. withdrawal took three years to take effect, allowing former President Joe Biden to swiftly reinstate American participation in the accords. This time, however, the U.S. could completely quit the Paris Agreement in just one year.