From the BBC World Service: A union representing workers at South Korean technology giant Samsung Electronics has called on its 30,000 members to go on strike indefinitely as part of its campaign for better pay and benefits. Plus, NATO members are holding a three-day summit to mark the organization’s 75th birthday — and the focus is on Ukraine. Then, we visit the Danish town where Novo Nordisk, maker of weight-loss drug Ozempic, is based.