US first lady Melania Trump presided over a UN Security Council meeting on Monday focusing on children in conflict, one of her signature issues, at a turbulent time as the United States has joined Israel in attacking Iran. She was the first spouse of a world leader to take the president's seat at the United Nations' most powerful body, which is charged with ensuring global peace and security, according to the UN. The wife of President Donald Trump was given the opportunity as the United States takes over the council presidency for the month of March. In the past, presidents, prime ministers and foreign ministers have often wielded the gavel. The first lady arrived at UN headquarters in a motorcade and was greeted by UN Secretary-General Antonio Guterres. She shook hands with each of the 15 Security Council members and posed for a group photo. The rotating president of the council gets to choose the subject and participants for some meetings. Monday's meeting, which was scheduled .