Vladimir Putin has undergone a successful surgical procedure to remove fluid from his abdomen, according to a Russian opposition source. While there was no independent corroboration of the treatment, General SVR Telegram channel claimed the procedure the Russian president had, was successful. The channel has made repeated claims over more than 18 months that Putin is suffering from abdominal cancer, among a range of other health problems. -snip- General SVR Telegram said the procedure to remove fluid from his abdominal cavity was separate from surgery linked to cancer, that it has claimed he is due to undergo soon. If true,...