U.S. Secretary of State John Kerry, a Vietnam War veteran, delivers the keynote address at the LBJ Presidential Library’s Vietnam War Summit on Wednesday, April 27, 2016. Kerry, a former U.S. senator and co-founder of Vietnam Veterans of America, gained national attention when he spoke out publicly against the Vietnam War. Foto: LBJ Library, Quelle: Flickr, Lizenz: Public Domain Mark 1.0