Charles Bolden on Humanity and a Multi-Planet Future | Asteroid Strikes at Atomic Bomb Levels | NASA Spacewalk

Mars Missions Could Make Humanity a Multi-Planet Species, NASA Chief Says NASA chief Charles Bolden thinks that humans need to explore Mars in order to become a multi-planet species.
Spacewalking Astronauts Replace Dead Computer on Space Station A pair of NASA astronauts replaced a dead backup computer on the International Space Station during a short spacewalk Wednesday (April 23) to restore a critical computer system back to full strength.
	Image of the Day Astrophotographer Dora Miller sent in a photo of an auroral display over Alaska, taken April 20, 2014.
	Powerful Asteroids Strike Earth with Surprising Frequency (Video) Since the start of the 21st century, dozens of incoming asteroids have slammed into Earth, some of them packing far more energy than a city-destroying atomic bomb, a new animation illustrates.
	US Leading the Path to Mars: NASA Chief Charles Bolden (Op-Ed) NASA continues to lead global efforts to send the first astronauts to Mars, with progress evident at every step along the way, says NASA administrator Charles Bolden.
	Space History Photo: M2-F3 In-Flight Launch from the B-52 Mothership The M2-F3 is launched from the B-52 Mothership.
	Governing - Space Sponsored Content Is a monthly magazine whose primary audience is state and local government officials: governors, legislators, mayors, city managers, council members and other elected, appointed and career officials.
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