Effectiveness of Ford Firestone Tire Recall Questioned

A research group has called into question the 2000-01 Firestone tire recall.  Safety Research & Strategies has noted instances in which some defective tires may still be in circulation.  The group has asked the National Highway Traffic Safety Administration to investigate the effectiveness of the recall in the wake of four serious auto accidents caused by defective tires.  Thus far, the NHTSA has not commented whether or not it will conduct such an investigation.