UNITED NATIONS — The United States finally has representation at the United Nations after former national security adviser Mike Waltz presented his ambassadorial credentials to U.N. Secretary-General António Guterres on Sunday before the start of this week’s 80th U.N. General Assembly High-Level Week in New York City.

Waltz was nominated to become President Donald Trump‘s ambassador to the U.N. in May after he mistakenly added Atlantic Editor-in-Chief Jeffrey Goldberg in March to a Signal messaging group chat discussing U.S. strikes against Houthis in Yemen in his capacity as the U.S.’s top national security aide.