On Oct. 13, 1792, the cornerstone of the executive mansion, later known as the White House, was laid during a ceremony in the District of Columbia.

Ten years ago

The United Nations General Assembly appointed South Korean Foreign Minister Ban Ki-moon the next U.N. secretary general. Banker Muhammad Yunus of Bangladesh won the Nobel Peace Prize for using microcredit to lift people out of poverty. U.S. Rep. Bob Ney, R-Ohio, pleaded guilty in an influence-peddling investigation of Congress. (Ney served nearly a year and a-half of his original 21/2- year prison sentence.)

Five years ago

Raj Rajaratnam, the hedge fund billionaire at the center of one of the biggest insider-trading cases in U.S. history, was sentenced by a federal judge in New York to 11 years behind bars. The Detroit Tigers took a 3-2 lead in the AL championship series, defeating the Texas Rangers 7-5. The Milwaukee Brewers tied the NL championship series at two games apiece with a 4-2 win over the St. Louis Cardinals.

One year ago

Hillary Clinton and Sen. Bernie Sanders clashed over U.S. involvement in the Middle East, gun control and economic policy in the first Democratic presidential debate held in Las Vegas, but in a moment of political unity, Sanders leapt to Clinton’s defense on the issue of her controversial email practices as secretary of state. Twitter announced it was laying off up to 336 employees.

— By The Associated Press