An Iranian woman holds a poster of Iran's late founder of the Islamic Republic, Ayatollah Ruhollah Khomeini, on the occasion of 40th anniversary of Khomeini's return from exile from Paris at his mausoleum in southern Tehran on February 01, 2019. - Iran, which began celebrations for the 40th anniversary of its Islamic revolution on Friday, is the world's largest Shiite Muslim country and a fierce rival of Sunni kingpin Saudi Arabia. (Photo by STR / AFP)        (Photo credit should read STR/AFP via Getty Images)