. >> sreenivasan: metzler's former deputy, thurman higginbotham, generally blamed out-moded record keeping. >> it was always conceptual that anything done by hand for 140- plus years that there would have to be some errors somewhere. >> sreenivasan: higginbotham refused to answer most other questions, citing his right against self-incrimination. the estimate on how much oil has spilled into michigan's kalamazoo river rose sharply today. the environmental protection agency said more than one million gallons of oil may have leaked from a pipeline since monday. the oil could reach lake michigan, 80 miles downstream. and, in new orleans, the government point man on the gulf oil spill, thad allen, said the effort to plug the blown well could begin by this weekend. on wall street today, the dow jones industrial average lost more than 30 points to close at 10,467. the nasdaq fell nearly 13 points to close at 2,251. toyota has announced yet another recall in north america. 400,000 vehicles in the u.s. and canada may have steering problems. the recall is mostly for avalons from the 2000 to 2004 mod