North Korea has sent around 720 more balloons carrying trash to South Korea and continued jamming GPS signals for five straight days against the South, Seoul's military said Sunday, as South Korea's presidential office was considering taking countermeasures. South Korea's Joint Chiefs of Staff said it has detected some 720 balloons that floated across the Military Demarcation Line separating the two Koreas and fell in different parts of the country between 8 p.m. Saturday and 1 p.m. Sunday. The