About 30 North Korean defectors and South Korean activists plan to send anti-Pyongyang leaflets across the border via balloon this weekend, an organizer said Friday, in the latest campaign that could further anger Pyongyang amid lingering tensions. Park Sang-hak, a defector-turned-activist who has led the campaign for years, said they will launch the balloons carrying the leaflets as well as 2,000 US$1 bills and DVDs in a ceremony near the western section of the heavily fortified border on Saturday morning.