The statement is a commemorative note marking the anniversary of a commencement address given by Robert Costa at American University's School of Public Affairs. The content of the linked video, which is a commencement address, likely contains substantive engagement with public issues or discussions, given Costa's roles in journalism. However, the tweet itself primarily serves as a reminder or celebratory note rather than engaging in public discourse directly. It does not substantively address public issues or policies but rather points to an event where such discourse may have occurred.