US Secretary of State Mike Pompeo announces that the US will designate Iran's Islamic Revolutionary Guard Corps (IRGC) as a Foreign Terrorist Organization (FTO) during a press conference at the State Department in Washington, DC, April 8, 2019. - President Donald Trump on April 8, 2019 announced the United States is designating Iran's elite military force, the Islamic Revolutionary Guard Corps, a terrorist organization. Trump said in a statement that the "unprecedented" move "recognizes the reality that Iran is not only a State Sponsor of Terrorism, but that the IRGC actively participates in, finances, and promotes terrorism as a tool of statecraft." (Photo by SAUL LOEB / AFP)

US Secretary of State Mike Pompeo announces that the US will designate Iran's Islamic Revolutionary Guard Corps (IRGC) as a Foreign Terrorist Organization (FTO) during a press conference at the State Department in Washington, DC, April 8, 2019. - President Donald Trump on April 8, 2019 announced the United States is designating Iran's elite military force, the Islamic Revolutionary Guard Corps, a terrorist organization. Trump said in a statement that the "unprecedented" move "recognizes the reality that Iran is not only a State Sponsor of Terrorism, but that the IRGC actively participates in, finances, and promotes terrorism as a tool of statecraft." (Photo by SAUL LOEB / AFP)

US Secretary of State Mike Pompeo announces that the US will designate Iran's Islamic Revolutionary Guard Corps (IRGC) as a Foreign Terrorist Organization (FTO) during a press conference at the State Department in Washington, DC, April 8, 2019. - President Donald Trump on April 8, 2019 announced the United States is designating Iran's elite military force, the Islamic Revolutionary Guard Corps, a terrorist organization. Trump said in a statement that the "unprecedented" move "recognizes the reality that Iran is not only a State Sponsor of Terrorism, but that the IRGC actively participates in, finances, and promotes terrorism as a tool of statecraft." (Photo by SAUL LOEB / AFP)

US Secretary of State Mike Pompeo announces that the US will designate Iran's Islamic Revolutionary Guard Corps (IRGC) as a Foreign Terrorist Organization (FTO) during a press conference at the State Department in Washington, DC, April 8, 2019. - President Donald Trump on April 8, 2019 announced the United States is designating Iran's elite military force, the Islamic Revolutionary Guard Corps, a terrorist organization. Trump said in a statement that the "unprecedented" move "recognizes the reality that Iran is not only a State Sponsor of Terrorism, but that the IRGC actively participates in, finances, and promotes terrorism as a tool of statecraft." (Photo by SAUL LOEB / AFP)

(FILES) In this file photo taken on September 24, 2018 Hossein Salami deputy commander of the Islamic Revolutionary Guard Corps attends a public funeral ceremony for those killed during an attack on a military parade on the weekend, in the southwestern Iranian city of Ahvaz. - President Donald Trump on April 8, 2019 announced the United States is designating Iran's elite military force, the Islamic Revolutionary Guard Corps, a terrorist organization. Trump said in a statement that the "unprecedented" move "recognizes the reality that Iran is not only a State Sponsor of Terrorism, but that the IRGC actively participates in, finances, and promotes terrorism as a tool of statecraft." (Photo by ATTA KENARE / AFP)

(FILES) In this file photo taken on September 22, 2018 members of Iran's Revolutionary Guards Corps (IRGC) march during the annual military parade marking the anniversary of the outbreak of the devastating 1980-1988 war with Saddam Hussein's Iraq, in the capital Tehran. - President Donald Trump on April 8, 2019 announced the United States is designating Iran's elite military force, the Islamic Revolutionary Guard Corps, a terrorist organization. Trump said in a statement that the "unprecedented" move "recognizes the reality that Iran is not only a State Sponsor of Terrorism, but that the IRGC actively participates in, finances, and promotes terrorism as a tool of statecraft." (Photo by STRINGER / AFP)