As the US declines its traditional leadership role, NATO members are squabbling among themselves and rebels in Libya may be fighting a losing battle. Does Moammar Gadhafi now have the upper hand--both militarily and diplomatically? Will the US help arm the rebels on its own? Also, President Obama Calls House Speaker Boehner in the hopes of avoiding a shutdown. On Reporter's Notebook, what can Earthlings learn from closeup study of the planet nearest the Sun? We hear about the mission to Mercury.
Banner image: Libyan rebels run for cover from artillery shells fired by forces loyal to leader Moammar Gadhafi outside the eastern oil town of Brega, on April 5, 2011. Photo: Mahmud Hams/AFP/Getty Images