An empty activity therapy room is seen at the Psychiatric Inpatient Program at San Quentin State Prison in San Quentin, California December 29, 2015. America's most populous state, which has not carried out an execution in a decade, begins 2016 at a pivotal juncture, as legal developments hasten the march toward resuming executions, while opponents seek to end the death penalty at the ballot box. To match Feature CALIFORNIA-DEATH-PENALTY/ REUTERS/Stephen Lam