North Korean dictator Kim Jong Un believed to have turned 40

North Korean leader Kim Jong Un is believed to have turned the big four-oh on Monday, but state media continued its decades of silence on his birthday. Kim's birthday is believed to be Jan. 8, though his secretive regime has never confirmed the date. The U.S. government lists Kim's birth year as 1984, making him 40 years old this year. The birth dates of Kim's father and grandfather, who preceded him as rulers, are national holidays in the authoritarian state.