Korea

 CNN - North Korea sent another wave of balloons purportedly filled with waste and trash into South Korea overnight, reigniting a tit-for-tat exchange as tensions on the Korean Peninsula continue to heighten. More than 1,000 such balloons from the North have made it into South Korean territory since May, according to a CNN tally. North Korean Leader Kim Jong Un has said the balloons were a "responsive act" to the South's years-long practice of flying leaflets that contain materials critical of his regime. The latest balloon salvo comes as inter-Korean diplomacy remains at an impasse. Russian President Vladimir Putin signed a defense agreement with North Korea last week as talks on its denuclearization efforts have stalled, and Kim has vowed to expand his country's nuclear arsenal.