Dmitry Medvedev, Russia's prime minister, gave the nation his views on more than he intended on Friday. Mr Medvedev let his guard down after an interview with five Russian television stations when he failed to realise the cameras were still rolling. [One] of the journalists asked whether the president is handed secret files on aliens when receiving the briefcase needed to activate Russia's nuclear arsenal. Along with the briefcase with nuclear codes, the president of the country is given a special 'top secret' folder. This folder in its entirety contains information about aliens who visited our planet," Mr Medvedev answered playfully. "Along with this, you are given a report of the absolutely secret special service that exercises control over aliens on the territory of our country ... More detailed information on this topic you can get from a well-known movie called 'Men In Black' ... I will not tell you how many of them are among us because it may cause panic," he says. None of the television stations that interviewed Mr Medvedev broadcast the off-air comments, but they were delivered to Reuters as a pool signal and some were shown on YouTube. Even during the interview itself, Mr Medvedev answered some unusual questions. Asked whether he believed the world would end on Dec. 21 under a New Age prophecy, he said no.