The New York Times (registration required) reported Sunday that abusive treatment of prisoners at Guantanamo Bay has been widespread, longstanding, and primarily directed at intelligence targets, according to several military guards, agents and other staff at the detention facility. This contradicts repeated assertions by military officials, including the drafters of the Schlesinger report, that abuse had occured only in isolated cases and was not used as an intelligence-gathering tactic. The new allegations describe abuses ranging from replacing prisoners' prayer oil with caustic floor cleanser, to placing nude prisoners in cold rooms where they were shackled between speakers playing hard rock at extremely high volume for up to 14 hours at a time. Meanwhile, AP reports that, according to Pentagon sources, at least seven former Guantanamo prisoners have returned to terrorism since US officials released them after determining that they no longer posed a threat and had no remaining intelligence value.