Today, you'll hear about my most passionate adventures while climbing Mt. Kilimanjaro, the highest mountain peak on the continent of Africa.    David and I carefully planned and executed this amazing feat at ages 66 and 64, which was a record-breaking experience, not thought to be possible at the time.  We trained, we shopped and we dieted to become world-class mountain climbers, and at the same time we learned a very important rule about how achievement happens, sometimes without you even knowing it.