Also on this day: (Universal History Archive/Getty Images) The entertainment trade publication Variety comes out with its first weekly issue.President Harry S.Truman proclaims a national state of emergency in order to fight “world conquest by Communist imperialism.” A United Air Lines DC-8 and a TWA Super Constellation collide over New York City, killing 134 people.The government halts its swine flu vaccination program following reports of paralysis apparently linked to the vaccine.