(AP) -- Echoing the words of President Bush a day earlier, Gov. Kathleen Blanco took responsibility Wednesday for failures and missteps in the immediate response to Hurricane Katrina and pledged a united effort to rebuild New Orleans and the surrounding parishes ravaged by the storm. "We all know that there were failures at every level of government: state, federal and local. At the state level, we must take a careful look at what went wrong and make sure it never happens again. The buck stops here, and as your governor, I take full responsibility," Blanco told lawmakers in a special...