It all started with a cold! Add to that "playing too hard" and "world travel" and you end up with a patient in St Anthony Hospital in Lakewood, CO.
Upon arriving home from his Grey Guys ski trip to Norway, John wasn't feeling well. So a middle-of-the-night visit to the hospital in Frisco gave us a preliminary diagnosis of pneumonia. They admitted John to one overnight and more tests. By the next morning, the diagnosis was changed to pulmonary emboli and John got a Helicopter ride down to Lakewood to the St Anthony's Hospital.
The diagnosis of pulmonary emboli was confirmed. Along with this diagnosis you get to add "a flutter" (elevated heart rate) and fluid on the lungs (coughing jags).
I'm no doctor, so you are stuck with my side of the story. I'll try to provide a layman's interpretation of the latest updates.