Being "fit to fly" is more than just a physical condition, it's also a mental one. "We're talking about having both the cognitive ability to process information, as well as the emotional stability," said Dr. Dan Danzyck, a fellow in aerospace medicine at the Mayo Clinic. Danzyck said issues such as inability to sleep and difficulty concentrating on day-to-day tasks could be two signs that help is needed. This week's NBAA Flight Plan podcast, sponsored by Jet Quest, looks at the issue of mental fitness, and provides suggestions on where to turn for help.