Camp Century / Project Iceworm

I'm a researcher looking at Camp Century / Project Iceworm, a cold war project in the 1960s involving the construction of a subsurface military base underneath the Greenland ice sheet. Ultimately I'm hoping to speak to surviving veterans who built the base. Does anyone know how I could a) find out who worked on this project and b) locate and sensitively approach those who are still with us to hear their stories?

This was a large project with involvement from various military organisations at the time including: the U.S. Army Polar Research and Development Center (which no longer exists in the same form) and the U.S. Army Engineer Research and Development Laboratory.

Thank you,
Dave Anderson