 In some cases, courts have opted to keep trials secret in proceedings against persons charged with terrorism, to protect its intelligence gathering methods and contacts from exposure.In a case in Britain, in which a soldier was on trial for murdering an Afghan insurgent, there was an effort to keep the trial secret to protect him from possible future retribution, but there were calls for the identity of the soldier to be publicized based on the principle of open justice.In situations when aspects of trials are kept secret, critics favoring open justice have argued that the secrecy is not needed for national security but is "nothing more than a useful drape to cover the inconvenient or the merely embarrassing."