Today will mark the first meeting of Pope Leo and a US Capitol Official in almost one year, as Marco Rubio travels to the Vatican.  This meeting follows outcry from Donald Trump who lashed out at the pope over his condemnation of the US-Israeli war on Iran. 

Gerard O’Connell, Vatican Correspondent for America magazine and author "The Election of Pope Francis: An Inside Account of the Conclave that changed history" takes a look ahead to this meeting.