The United States is in the middle of a resurgent national conversation about the ethics and legality of torture, thanks primarily to President Donald Trump's choice of Gina Haspel, the current acting director of the Central Intelligence Agency, who oversaw the torture of detainees at a "black site" prison in Thailand, to head the agency. Among the questions that come up as part of one of America's most enduring post-9/11 debates: Does torture work? What are the long-term consequences? And at what point does torture compromise the country's moral standing?