President Donald Trump is using a proclamation on United Nations Day to urge its 193 member states to work together as the world organization's founders intended "and confront those who threaten chaos, turmoil and terror."

Stressing the importance of multilateralism, he reaffirmed the U.S. commitment to U.N. goals and said its purpose "remains as essential today as ever before" — to have diverse nations cooperate "to preserve sovereignty, enhance security, build prosperity, and promote human rights and fundamental freedoms."

Trump's tweet and proclamation marking Tuesday's 72nd anniversary of the entry into force of the U.N. Charter came four days after the president met with Secretary-General Antonio Guterres at the White House for their first extended conversation, which included North Korea, Myanmar, Syria, Iraq, terrorism and U.N. reform.