Financier Bernard Baruch coined the term “cold war” in a speech in South Carolina.
Most of Texas City, Tex., destroyed when French ship Grandcamp exploded.
Hockey great Wayne Gretzky announced his retirement.
A male student, Cho Seung-Hui, killed two in a Virginia Tech dorm, then killed 30 more 2 hours later in a classroom building. His suicide brought the death toll to 33, making the shooting rampage the most deadly in U.S. history. Fifteen others were wounded.