Yer... that has always been the fear of near surgery to all military as well. It can literally be a career ender, yet so normal to soldiers due to the stress place upon the knees in training and exercise. I was heading towards it, though didn't need it as discharged... though that may of only put it off until later in life as my knee buckles some times, though isn't annoying enough to make the time of day for me at this stage.
Start running again tomorrow, so hopefully that will strengthen it up again... on a running machine, so nice and dampened.