The Frecce Tricolori Italian Air Force acrobatic squad flies over Rome's skyline on the occasion of the 72nd anniversary of founding of the Italian Republic in 1946, Saturday, June 2, 2018. [Photo: AP/Gregorio Borgia]

Smoke in the colors of the Italian flag is left behind after the flying over Rome's skyline by the Frecce Tricolori Italian Air Force acrobatic squad on the occasion of the 72nd anniversary of founding of the Italian Republic in 1946, Saturday, June 2, 2018. [Photo: AP/Gregorio Borgia]

Smoke in the colors of the Italian flag is left behind after the flying over Rome's skyline by the Frecce Tricolori Italian Air Force acrobatic squad on the occasion of the 72nd anniversary of founding of the Italian Republic in 1946, Saturday, June 2, 2018. [Photo: AP/Gregorio Borgia]