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Perhaps hoping to snag a last-minute invite to D.C's fireworks extravaganza, Russian President Vladimir Putin called President Obama on Friday to wish him a happy Fourth of July. Putin told Obama he hoped the two nations could "continue successful development on a pragmatic and equal basis despite the current differences and difficulties," according to a Kremlin statement.

"The president also stressed that Russia and the United States are both countries bearing particular responsibility for ensuring international stability and security," the statement went on, "and should therefore cooperate not just for the benefit of their own peoples but also in the entire world's interest."