Louis Ignarro - Louis Ignarro's Agora Talk “Dr. NO – The Discovery That Led to a Nobel Prize and Viagra” moderated by Adam Smith. Louis Ignarro  - Louis Ignarro talking to young scientists during his science walk at the 68th Lindau Nobel Laureate Meeting Louis Ignarro - Louis Ignarro together with young scientists in front of the Lindau’s harbour entrance Louis Ignarro  - Louis Ignarro giving his lecture on 'The Road to Stockholm - A Nobel Mission'