Barb Kristen

(1/4) Barb Kristen celebrated a birthday then retired the next day. What a nice gift! She worked with Dmitri Denisov for many years. people, retirement Photo: Leticia Shaddix

(1/4) Barb Kristen celebrated a birthday then retired the next day. What a nice gift! She worked with Dmitri Denisov for many years. Photo: Leticia Shaddix

(2/4) Barb doesn't look too happy to retire. people, retirement Photo: Leticia Shaddix

(2/4) Barb doesn’t look too happy to retire. Photo: Leticia Shaddix

(3/4) Barb Kristen gives a hug to Luz Jaquez. people, retirement Photo: Leticia Shaddix

(3/4) Barb Kristen gives a hug to Luz Jaquez. Photo: Leticia Shaddix

(4/4) Barb Kristen has held the lowest badge ID number for some time now. Her colleagues celebrate her time at Fermilab. people, retirement Photo: Leticia Shaddix

(4/4) Barb Kristen has held the lowest badge ID number for some time now. Her colleagues celebrate her time at Fermilab. Photo: Leticia Shaddix