A friend of mine from my days at IDEO has died in a plane crash along with two of his colleagues. The details are not clear; although the plane did crash on takeoff during poor weather there are some indications that mechanical failure may have played a role in this tragic accident. What I do know is that Doug was a great guy and probably the most responsible and careful private pilot I've met. Regardless of the cause, it's a very sad situation. Our thoughts go to the families and friends of those who lost their lives today.