In Alaska, a two-stage rocket is helping scientists understand how the lights are formed and how they impact satellites. NBC’s Brian Williams reports.

CNN looks back at Barack Obama's singing, Bill Clinton's saxophone playing, and George W. Bush's dance moves.

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Feb. 21: Deputy Secretary of State Thomas Nides talks about Hillary Clinton’s promotion of “jobs diplomacy.”

Mexico, February 21 (ANI): As senior ministers from the world''s 20 most powerful economies gathered in Mexico on Monday for informal talks on the state of the global economy, U.S. Secretary of State ...

Jake Tapper discusses what rising oil prices mean for President Obama.