Hari interviews Miles, who is in Moscow on Yuri Gagarin and the first human spaceflight.
Margaret Warner talks to Ingrid Betancourt about her new memoir, "Even Silence Has an End," and her years as a hostage in the Colombian jungle.
In other news Monday, an American soldier and three Australian commandos died in Afghanistan when their military helicopter crashed. Also, an explosion at a coal mine in central China has killed at least 47 workers.
In other news, stocks dropped on Friday on news of weak consumer spending, and the White House said it was unhappy with the output of swine flu vaccine.
The space shuttle Atlantis lifted off Monday on the fifth and final mission to repair and upgrade the Hubble Space Telescope. The crew will add a new camera and make other changes. Spencer Michels reports.
In the day's other news, the stock market rose on new signs of life in the recession-weary economy and Somali pirates unsuccessfully tried to attack another U.S. ship.
By PBS NewsHour
One Japanese and two American scientists won the Nobel Prize in Chemistry on Wednesday for discovering and developing a glowing jellyfish protein that has revolutionized the way researchers study disease and normal development in living organisms.
By Admin, PBS NewsHour
Iranian President Mahmoud Ahmadinejad, whose visit to New York City Monday met with local protests, accused Israel of occupation and racism during a speech to the U.N. General Assembly.
After two delays and a year of troubleshooting, NASA successfully launched the space shuttle Discovery Tuesday sending seven astronauts to the International Space Station.
An independent board investigating the breakup of the space shuttle Columbia released its final report Tuesday morning.
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