Warning day in NRW, state-wide warning devices such as sirens, warning apps, cell broadcast and digital information boards were triggered with a test

---

Warning day in NRW, state-wide warning devices such as sirens, warning apps, cell broadcast and digital information boards were triggered with a test alarm to uncover problems with technology and cooperation, Düsseldorf, Germany

---

Size: 6155px × 8091px
Location: Düsseldorf, Germany
Photo credit: © Jochen Tack / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: alarm, alarmieren, broadcast, cell, civil, day, defense, digital, emergency, information, means, mobile, nationwide, north, nrw, phones, population, practise, protection, rhine-westphalia, security, signals, siren, sirenenton, sirens, technology, test, trial, warn-apps, warning