Imagine it is 2035. Your husband passed away a few years ago and at the age of 92 the doctor just told you have a cancer, which can be cured with a new type of treatment: bio-engineered cells that travel through your body to search, find and destroy cancer cells. Your 70-year old daughter insists you take the cure. She wants you to stay with her. But you hesitate. You’ve had a good life and you don’t want to take another cure that maybe extends your life with another 1, 2, 3, maybe 4 years.