An olive green North Korean train, emblazoned with a gold stripe, trundled across the border into Russia on Tuesday, carrying North Korea's Kim Jong Un to a meeting with President Vladimir Putin.In his first visit to any foreign country in over four years, Kim has reached Russia on Tuesday. The North Korean leader's visit to Russia occurs amid warnings from US, urging caution regarding any potential arms agreement between the two nations.In this week's episode of Story That Caught My Eye, we bring to you details of the North Korean leader's "swanky and superslow" bulletproof train.