April 10 – Opening Day of the 1961 Baseball Season
"Opening Day of 1961 Baseball Season. President Kennedy throws out the first ball. (first row) Vice President Johnson, President Kennedy, Dave Powers, Elwood Quesada. (second row) Secreatry of HEW Abraham Ribicoff, Assistant Press Secretary Andrew Hatcher, Senator Hubert Humphrey, Senator Everett Dirksen, Senator Mike Mansfield. (third row) Lawrence O’Brien, spectators. Washington, D.C., Griffith Stadium, 04/10/1961."