What's happening with Medicare in Washington? Live Q&A with AARP expert 12/5 4:00 p.m. EST

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Charles Bolden

The U.S. space commander talks about visiting Mars, threats from asteroids and international collaboration in space

Sebastian Junger

The author of 'Tribe' and 'The Perfect Storm' discusses veterans, alienation and nonfiction writing

Video: Why Getting to Jupiter Is a Big Deal

The Juno satellite, launched Aug. 5, 2011, is set to arrive at Jupiter on July 4

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Memorable — and Odd — Moments in Inauguration History

Remarkable and offbeat facts from past inaugurals

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Princess Diana: Rise of a 1980s Icon

From ‘Shy Di’ to global style-setter, she embraces royal life and fame

10 Must-Sees at the African American History Museum

Don’t miss these rare artifacts showcased in the newest addition to the Smithson

JFK: Personal Portraits From a Public Life

Jacques Lowe provided the nation with insider access to the Kennedy White House

Baby Boomers

A Generation Gives Back

Can older volunteers change the world by reaching out to America's Youth?

Quiz: The Generation Game

Do you know the difference between Millennials, Boomers, Gen Xers and Gen Zers? Test your knowledge

Boomers Turn 70

How this generation has influenced us all...and how it will change the world again

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