Video: 'David Frost extracts apology from Richard Nixon in famed interview'

(Wednesday, May 4, 1977, 7:30-9:00 p.m. EDT) — In the first of a four-part series of exclusive interviews by David Frost, former President Richard M. Nixon said tonight that he had “let the American people down” by lying, disregarding his constitutional oath and abetting the Watergate cover-up while in the White House (click here to watch an extended video from the interviews). Continue reading Nixon tells Frost he ‘let the American people down’ 40 years ago this hour #OnThisDay #OTD (May 4 1977) →

(Thursday, May 3, 2007, 8:00 p.m.-9:30 p.m. EDT) — Ten Republican presidential candidates held their first debate of the 2008 race tonight at the Ronald Reagan Presidential Library in Simi Valley, California, criticizing the Bush administration’s management the Iraq War but insisting that U.S. troops should not be withdrawn (click here to watch the full debate).

Video: 'Almanac: The Gary Hart scandal'

(Sunday, May 3, 1987, scheduled for 10:00 a.m. MDT) — The Miami Herald said today its reporters had observed a young woman (later identified as Miami model Donna Rice) spending “Friday night and most of Saturday” at a Washington townhouse belonging to Senator Gary Hart of Colorado, the front-runner for the 1988 Democratic presidential nomination. Continue reading Democratic presidential front-runner Gary Hart linked to woman 30 years ago #OnThisDay #OTD (May 3 1987) →

Video: 'American Experience Hoover Dam'

(Wednesday, April 30, 1947) — U.S. President Harry S. Truman signed a resolution today changing the name of Boulder Dam, a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the U.S. states of Nevada and Arizona, to Hoover Dam, after former President Herbert Hoover. Continue reading Boulder Dam officially renamed Hoover Dam 70 years ago today #OnThisDay #OTD (Apr 30 1947) →

(Thursday, April 26, 2007, 7:00 p.m.-8:30 p.m. EDT) — Eight Democratic presidential hopefuls gathered in Orangeburg, South Carolina, tonight for their first debate of the 2008 campaign, during which they heaped criticism on President George W. Bush’s Iraq policy (click here to watch the full debate).

(Monday, April 19, 1897) — Theodore Roosevelt, the 38-year-old newly appointed Assistant Secretary of the Navy by President William McKinley, arrived in Washington today and qualified in his new office.

(Saturday, April 15, 1837) — Abraham Lincoln, 28, arrived today in Springfield, Illinois, from New Salem, Illinois, with all of his belongings in two saddlebags to begin his law practice.

Video: 'PBS LBJ Part 1' (1937 campaign at 4:45)

(Saturday, April 10, 1937) — Youthful Lyndon B. Johnson, who shouted his advocacy of President Franklin D. Roosevelt’s plan to add more justices to the U.S. Supreme Court all over Texas’ 10th congressional district, was elected today to the seat in Congress that covered Austin and the surrounding hill country. Continue reading Johnson, backing Roosevelt’s court plan, wins seat in Congress in Texas election 80 years ago #OnThisDay #OTD (Apr 10 1937) →