The Boeing KC-135R Stratotanker, which is used to refuel military aircraft, set off from Chania International Airport on the Greek island of Crete around 14:15 UTC, the data shows.After an hour's journey of flying east and past the island nation of Cyprus, it spent two more hours flying in a pattern resembling a phallus, before breaking off and landing back in Chania at 18:45, per FlightRadar data.A KC-135 Stratotanker refueling plane remained for almost two hours east of Cyprus on Tuesday, in front of the Syrian base of Tartus, a stronghold of Moscow.US military pilots have encountered tense run-ins with Russian aircraft over the eastern Mediterranean before, such as when the Pentagon said in February that three US naval aircraft "experienced unprofessional intercepts by Russian aircraft."It's unclear if the stratotanker's flight pattern was intentionally made to resemble a phallus."