Tire Valve problems of the 1996 Honda Accord

Bridgestone weatherforce plus tires size p185/65r15 installed on 1996 Honda Accord. Tire mileage only 14,368. I was driving approx. 64mph on the freeway when the back end of my car began to wiggle and pull to the left. Next, I heard loud "flub-buddy" sounds. I immediately eased off the accelerator, punched the emergency blinking lights and made my way over to the freeway shoulder. The sidewall of the left rear tire was shredded and the stem valve was partially torn from the tire. People who helped me following the incident mentioned that the tire may have been defective. The next day I took up the matter with sears where I had purchased the tires, but the manager there put it down to "road hazard", and since I did not purchase "rh" insurance when I got the tires, he couldn't/wouldn't help me and suggested I take up the matter with bridgestone. If the incident was caused by road hazard, why weren't other cars around me affected? since then, I have researched the internet and discovered other drivers who have had problems with either this brand name and/or this tire line. I was lucky there was no one in the lane to my left when the tire malfunctioned. I hit no one nor was I hit by either the cars behind me or in the lane to my right as I made my way over to the freeway shoulder. It is to be hoped that other people with the same tires be as fortunate.