India, May 5 -- Russian President Vladimir Putin, the longest serving Kremlin chief since Josef Stalin, said in remarks aired on Sunday that he was always thinking about the succession, and suggested that there could be a contest between several candidates. "I always think about it," Putin, 72, said when asked if he thought about the succession in a film by state television about Putin's quarter of a century as Russia's leader entitled "Russia, Kremlin, Putin, 25 years".Agency...