 Complete the following phrase:  The Cold War museum has over 3 million worth of artefacts in its collection. Museum holdings include items from the 19481949 Berlin Airlift, the 1960 U-2 incident including the helmet used by Francis Gary Powers and the suitcase carried by Powers across Glienicke Bridge when he was exchanged for Rudolf Abel, a display on the Cuban Missile Crisis that includes a Soviet SA-2 missile and four American Nike missiles, and material from the 