Video: Inside Baby Lisa's Home

Oct. 18: Happy Alaska Day

On this day in 1867 the U.S. purchased Alaska from Russia for $7.2 million.

Oct. 12, 1928: First Use of a Clinical Respirator

Discover a surprising fact about Oct. 12, 1928.

Inside Baby Lisa's Home

ABC News' Dan Harris takes you inside the house where Lisa Irwin went missing.

Occupy Wall Street.: Why Won't They Leave?

The Wall St. protests are growing -- what's unifying their cause?

Meet the 'Money Zombies'

Dan Harris talks to an Occupy Wall Street protester.

Sept. 26: Kennedy-Nixon Debates

70 million people tuned in to watch the first televised presidential debate.

PSA Packed With Star Power

Celebrities share Boys and Girls Clubs of America experiences.

Diane Sawyer Talks Jacqueline Kennedy on 'Live'

"World News" anchor on the former first lady's audio tapes with Regis and Kelly.

Remembering 9/11: Brian Clark and Stanley Praimnath

Two strangers united in their survival on 9/11 have remained friends ever since.

9/11 Remembered: Survivor Stories

FDNY Deputy Chief Jay Jonas remembers being rescued by his fellow firefighters.

Jeffrey Kofman Explores Gadhafi's Secret Tunnels

Kofman speaks with a Libyan who came to see Gadhafi's underground world.