Four Puerto Rican nationalists, shouting for Puerto Rican independence, fire shots in the House of Representatives, wounding five Congressmen. Elsewhere that year:

_ Jonas Salk, physician, develops the injectible Salk vaccine for infantile paralysis (poliomyelitis). After schoolchildren in Pittsburg are vaccinated, a nationwide program begins.

_ The average American’s favorite meal is a fruit cup, vegetable soup, steak and potatoes, peas, rolls and butter, and pie a la mode.