Yesterday a friend provided me with some pictures she took in her food storage area. She has quite a bit of food stored but has not been keeping up with rotating the food. The other day she found three cases of canned tomato that had been stored since before Y2K. They had been stored behind other items and forgotten about. Even though they had been kept cool and protected from the elements, the cans had rusted through.
Most of the cans had leaked and the contents had evaporated. There was one or two that were still intact. I have one and intend to open it but will not make a taste test. Surprisingly enough the can I have is not swollen. In all the cans I have seen fail, tomatoes seems to be the most common contents. The shelve life of tomatoes should be considered shorter than most other products. Remember to rotate your foods.