By David Ljunggren, John Irish and Jarrett Renshaw KANANASKIS, Alberta (Reuters) - Leaders from the Group of Seven nations began annual talks on Monday with wars escalating in Ukraine and the Middle East,

Six of the Group of Seven leaders have discussed Russia’s war in Ukraine and international cooperation on key, non-military issues, wrapping up a summit that was forced to try and demonstrate how the wealthy nations’ club still can shape world events despite the early departure of U.

The Kremlin said on Tuesday that U.S. President Donald Trump was right to assert that it had been a big mistake to expel Russia from the Group of Eight in 2014, but that the G7 was no longer significant for Russia and looked "rather useless" now.