My heart is heavy.  Don was my first department chair at Whitmer.  I was a young teacher then.  He was amazing.  Always there for me and the other teachers.  I took over as treasurer of TAWLS after Don.  He was an amazing mentor.  He also had a great sense of humor.  We decorated his office many times and he took it all in stride.  Don was dearly loved by the math depart.  Sending prayers.