U.S. government actions against Cubana continued all along, with pressures being placed on Western petrol companies that supplied the airline on its international routes. Bombings, arson and other sabotage of Cubana's offices in Mexico, Canada and Western Europe also occurred occasionally, beyond aircraft hijackings. Groups and individuals claiming responsibility (or suspected) for these violent actions were known or alleged to have had CIA training or ties. Then, the missile crisis of October 1962 had a negative impact on the airline, as all of Cubana's services had to be suspended during the crisis, due to the threat of U.S. aerial bombardments and the potential for Cubana aircraft to be destroyed by U.S. warplanes. The memory of what had happened 18 months earlier (April 1961), during the CIA's aerial bombardment of Cuba, and the destruction of Cubana aircraft, caused the airline to take additional precautions (beyond suspension of all services). Some aircraft were dispersed and parked at various airports, and those flying abroad at the time the crisis started were instructed not to return. Disruptions continued after the end of the October missile crisis, but Cubana's services were nonetheless fully restored, and were helped by the ongoing acquisition of Soviet-built aircraft.