Question: Roberto Vittori and Maurizio Cheli have both flown for which air force?

Context paragraphs:
Ralph Cheli: Ralph Cheli (pronounced "Kelly" ; October 29, 1919—March 6, 1944) was a major in the United States Army Air Forces and a recipient of the Medal of Honor.  He served as the commanding officer of the 405th Bombardment Squadron (Medium) in the Fifth Air Force's 38th Bombardment Group, based at Durand Airfield, Port Moresby, New Guinea.

Bombing of Tan Son Nhut Air Base: The bombing of Tan Son Nhut Air Base occurred on April 28, 1975, just two days before the Fall of Saigon.  The bombing operation was carried out by the Vietnam People's Air Force (VPAF) Quyet Thang Squadron, using captured Republic of Vietnam Air Force (Republic of Vietnam Air Force) A-37 aircraft flown by VPAF pilots and Republic of Vietnam Air Force defectors led by Nguyen Thanh Trung who had bombed the Presidential Palace in Saigon, less than one month earlier.

Supermarine Walrus: The Supermarine Walrus (originally known as the Supermarine Seagull V) was a British single-engine amphibious biplane reconnaissance aircraft designed by R. J. Mitchell and first flown in 1933.  It was operated by the Fleet Air Arm (FAA) and also served with the Royal Air Force (RAF), Royal Australian Air Force (RAAF), Royal New Zealand Navy (RNZN) and Royal New Zealand Air Force (RNZAF).  It was the first British squadron-service aircraft to incorporate in one airframe a fully retractable main undercarriage, completely enclosed crew accommodation and all-metal fuselage.

Cheli Air Force Station: Cheli Air Force Station, formerly located within Bell in southeastern Los Angeles County, California, was a United States Air Force installation and a Cold War Radar Bomb Scoring site of the Strategic Air Command, from 1947 to 1961.

Maurizio Cheli: Maurizio Cheli (born 4 May 1959) is an Italian air force officer, a European Space Agency astronaut and a veteran of one NASA space shuttle mission.

Gerald Goodfellow: Gerald V. Goodfellow is a United States Air Force brigadier general.  He is the director of the Nuclear Enterprise (J10), at the Defense Threat Reduction Agency (DTRA).  Goodfellow was commissioned through Air Force ROTC at the University of New Mexico, and entered the Air Force in 1990.  Goodfellow has flown a wide variety of military aircraft, but primarily the B-1 Bomber.  In 1995, Goodfellow flew a non-stop flight around the world that set two world records.  For that flight Goodfellow won the Mackay Trophy for the U.S. Air Force's most meritorious flight of the year.  Goodfellow has commanded at flight, squadron, group, and wing levels.  Prior to assuming his current position, he was the commander of the U.S. Air Force's Squadron Officer College.

East Pakistan Air Operations, 1971: East Pakistan Air Operations incorporate the interdiction, air defense, ground support, and logistics missions flown by the Indian Air Force and the Bangladesh Air Force in support of the advancing Mukti Bahini (called Operation Cactus Lily) in the eastern theater of the Indo-Pakistani conflict of 1971.  Although the first of the engagements between the opposing airpowers occurred before the formal declaration of hostilities, the events described below include only those conducted after the declaration of war.  The Indian Air force also helped the Mukti Bahini organize a formation of light aircraft (called "Kilo flight") which were manned and serviced by Bengali pilots and technicians who had defected from the Pakistani Air Force.  This unit had launched attacks on targets in Bangladesh on 3 December 1971, prior to the start of formal combat between India and Pakistan.

Roberto Vittori: Roberto Vittori (born 15 October 1964 in Viterbo) is an Italian air force officer and an ESA astronaut.  After graduating from the Italian Accademia Aeronautica in 1989, Vittori flew in the Italian Air Force.  He then trained as a test pilot in the United States.

Darren W. McDew: Darren W. McDew (born September 29, 1960) is a United States Air Force general who serves as the Commander of United States Transportation Command Scott AFB, IL.  He used to be the Air Mobility Command and Eighteenth Air Force Commander.  McDew is a Command Pilot with over 3,300 hours of flight time.  He has flown the T-37B, T-38A, KC-135A/R, C-17A, C-141B, C-9, C-21, C-130E/H, and UH-1N.  He received the Air Force Distinguished Service Medal, the Defense Superior Service Medal, the Legion of Merit, and others.

Air Force Test Center: The Air Force Test Center (AFTC) is a development and test organization of the United States Air Force.  It conducts research, development, test, and evaluation of aerospace systems from concept to deployment.  It has test flown every aircraft in the Army Air Force's and the Air Force's inventory since World War II.  The center employs nearly 13,000 people and controls the second largest base in the Air Force.

Supporting paragraphs: Roberto Vittori Maurizio Cheli
Answer: Italian air force