As a follow-up to a previous post on asbestos, you need to know that asbestos is in far more than you might think. Although it's use has been drastically reduced in common household items since about 1980, you might still find it in ceiling tiles, popcorn ceilings, vinyl flooring, roof shingles, and some types of siding.
The danger from asbestos comes when tiny particles break off and are inhaled, which can lead to cancer, specifically mesothelioma. If you'd like more information, the folks at Mesothelioma.net would be glad to give you a free information packet. This could be especially helpful if you were exposed to asbestos in the military.