Then-Secretary of State John Kerry holds his granddaughter as he signs the Paris Agreement on climate change in April 2016. Kerry has been chosen as climate envoy in the incoming Biden administration.

U.S. Secretary of State John Kerry holds his granddaughter Isabel Dobbs-Higginson as he signs the Paris Agreement on climate change, Friday, April 22, 2016 at U.N. headquarters. (AP Photo/Mark Lennihan)