Donald Mount Hunten’s obituary is found on the University of Arizona site. He sounds much like his sister Janet, a genius who sees the connections between many fields of endeavor, and who is a razor-sharp advisor to many individuals and organizations .
There’s much about James Hansen on Wikipedia: http://en.wikipedia.org/wiki/James_Hansen
His NASA homepage is: http://www.giss.nasa.gov/staff/jhansen.html
His Home Page at Columbia University [ http://www.columbia.edu/~jeh1/ ]
has more information on it, including things like an interview between Hansen and James McKibbon, of 350.org, which will be included in the paperback version of Storms of My Grandchildren [due out in a month or so].