NASA Administrator Charles Bolden speaks during a ceremony for winners and participants of NASAÕs 2009 Centennial Challenges, Friday, Feb. 26, 2010, at NASA Headquarters in Washington. The year-long competition addresses a range of technical challenges that support NASA’s missions in aeronautics and space with a goal of encouraging novel solutions from non-traditional sources. Photo

NASA Administrator Charles Bolden offers his thoughts on a range of topics, including reliance on Russia during the post-shuttle era, cancellation of the Constellation program and the future of U.S. space exploration, in an interview with ABC News.

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