Happy birthday, Kim Jong-Un!&nbsp;The new North Korean leader&amp;#8217;s birthday, his first as Supreme Leader of North Korea, was celebrated by the country&amp;#8217;s propaganda machine thanks to a documentary that aired on state television. The video reveals him riding a horse, hanging at an amusement park, and &nbsp;&hellip; most importantly, suggesting way back in 2009 that he&amp;#8217;d be willing to wage war with South Korea and the U.S. if they shot down a Nor