This combination photo shows federal death row inmates Robert Bowers, from left, the gunman who massacred 11 worshippers at a Pittsburgh synagogue in 2018, Dylann Roof, who commited racist slayings of nine members of a Black South Carolina congregation, and Dzhokhar Tsarnaev, convicted for carrying out the April 15, 2013, Boston Marathon bombing attack. President Joe Biden commuted the sentences of 37 of the 40 people on federal death row, converting their punishments to life imprisonment, but left Bowers, Roof and Tsarnaev still facing execution. (Pennsylvania Department of Transportation, from left, Charleston County Sheriff's Office, FBI via AP)