US Attorney General William Barr announced on Thursday that the federal government will resume executing death-row inmates, a practice halted since 2003. The death sentence is rare in federal cases, with only three executions total having taken place since 1988. At the state level, the death penalty has been made illegal in 21 jurisdictions, and President Obama ordered a federal moratorium after a botched execution in the state of Oklahoma in 2014. Barr’s order will end that moratorium, with the main change being a switch from the three-drug cocktail formerly…