On April 20, 1898, President William McKinley asked Congress to declare war on Spain, two months after two explosions sank the USS Maine in Havana, Cuba. During those two months, newspaper baron Randolph Hearst and others whipped up public sentiment to go to war to give Cubans their independence and attacked McKinley for weakness in not acting more aggressively.
On April 20, 1999, two teenager students planned and carried out a shooting spree at their Columbine High School in Littleton, Colorado, killing 13 people, a teacher and 12 fellow students, and wounding 23 others, before committing suicide by shooting themselves.