So is that it? Is the downturn over? After bouncing off of 6500, or more than half its peak value, and with Citigroup briefly breaking $1, the Dow Jones Industrial Average has rallied back more than 1200 points. So, is it safe to go back in the water? Best to figure out what went wrong first -- what I like to call a bear-raid extraordinaire.The Dow clearly got a boost from Treasury Secretary Tim Geithner's new and improved plan, announced on Monday, to rid our banks of those nasty toxic assets. The idea is to form a "Public-Private Investment Fund"...