Seoul [South Korea], June 2 (ANI): Ramping up its ‘trash balloon operations’, North Korea sent 600 more trash-filled balloons to South Korea on Saturday evening, leaving bits of paper, cloth, and cigarette butts scattered over the nation, CNN reported, citing Seoul officials. South Korea’s Joint Chiefs of Staff had said “no substances harmful to safety have been found” among the balloons that reached the country on Saturday evening – unlike just a few days ago when used toilet paper was found in some of the about 150 balloons that crossed the border. In the most recent images made public by th…