The foreign policy of the Joe Biden administration emphasizes repairing the U.S.'s alliances, which Biden says had been damaged under the Trump administration, and returning the U.S. to a "position of trusted leadership" among world democracies to counter challenges from Russia and China. As president, Biden has sought to strengthen the transatlantic alliance between the U.S. and Europe, and he recommitted the U.S. to the NATO alliance and collective security. Biden returned the U.S. to the Paris Climate Agreement and has taken other steps to combat climate change. His administration emphasizes international cooperation to combat the COVID-19 pandemic, as well as U.S. defenses against foreign-sponsored cyberattacks and cyberespionage.