and this bridge should exist in every classroom. learn about our life cycle developing a mill learn about our life cycle management programs for roof supports and how they can extend your equipment life. by the end the vaccine is finally found and it is still kept a secret. present four basic questions about the universe, each of which has two and only two alternatives. we do not build products and then put them on a shelf, hoping they will be used “as is.” rather, every solution is a custom fit. 