The Minnesota Legislature's regular session came to a close early this morning (TUESDAY) with a filibuster that blocked final action on expanding nuclear waste storage at Xcel Energy's Prairie Island plant. The power company is seeking to increase waste storage in order to keep the plant operating through the end of its current federal license in 2014. But a handful of Senate Democrats managed to stall action on a measure that they criticized as environmentally unsound. The issue is likely to return in a special session that begins today. Minnesota Public Radio's Michael Khoo has more.