Laurence Adolph Steinhardt, American economist, lawyer, and senior United States Department of State diplomat, U.S. Ambassador to six countries. He served as U.S. First Minister to Sweden, U.S. Ambassador to Peru, U.S. Ambassador to the Soviet Union, U.S. Ambassador to Turkey, U.S. Ambassador to Czechoslovakia and United States Ambassador to Canada. He was killed in a U.S. embassy plane crash on March 28, 1950, in Ramsayville, Ontario, Canada, while serving as U.S. Ambassador to Canada. He was the first United States Ambassador to be killed in the line of duty.