You're going to hear a genuine BBC news report from 26 May, 2016. Before you listen, read these three summaries: 1. America's nuclear defences are using very modern technology. 2. America's nuclear defences are using outdated technology. 3. America's nuclear defences have recently improved their technology. The US government Accountability Office says it's concerned that many federal activities, including the country's nuclear arsenal, urgently need to upgrade outdated technologies. It said Pentagon systems helping to coordinate the strategic deterrent, such as intercontinental ballistic missiles and nuclear bombers rely on 40-year-old computers and floppy disks.