Will 'Top Kill' Prevent a Disaster from Getting Worse?

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President Obama will announce new deep-sea oil regulations tomorrow, and Friday he'll visit the Gulf coast for the second time since the spill.  Will BP finally have plugged the oil gusher?  We get a progress report today on what's called “Top Kill.”   Also, retiring the Space Shuttle Atlantis, and a month ago, the Obama Administration said the Mexican border was as secure as it's ever been. So why are 1200 National Guard troops needed to help law enforcement?

Banner image: Helix Q4000 on location of MC 252 as it prepares for "Top Kill" in the Gulf of Mexico, © BP p.l.c.