After the IRGC shoots down a U.S. drone in Iranian airspace on June 20:

“The Americans must mind their manners, because the era of looking down on the Iranian nation is over.”“No Specter of War, IRGC General Stresses,” Tasnim News Agency, June 26, 2019, https://www.tasnimnews.com/en/news/2019/06/26/2041037/no-specter-of-war-irgc-general-stresses.