The Iranian president has vowed to exact revenge for Mohsen Fakhrizadeh, who was shot and killed in an ambush as he was traveling through the countryside. SUBSCRIBE to GMA https://bit.ly/2Zq0dU5 To read the full story and others, visit http://www.goodmorningamerica.com Good Morning America (GMA) brings viewers an award-winning combination of breaking news, exclusive investigations, hard hitting interviews, weather forecasts, cutting edge medical field information, and financial reporting every morning. Join Robin Roberts, George Stephanopoulos, Lara Spencer, Michael Strahan, Amy Robach and Ginger Zee weekdays at 7am on ABC. Follow GMA across the web-- Facebook: https://www.facebook.com/GoodMorningAmerica Twitter: https://twitter.com/gma Instagram: https://instagram.com/goodmorningamerica #GMA #Iran #NuclearScientist #Ambush