Campaña Look Up en Londres
https://www.change.org/p/transport-for-london-get-tfl-to-add-look-up-does-someone-need-your-seat-to-their-announcements-lookup
https://blogs.20minutos.es/madrereciente/2018/06/12/la-conveniencia-de-ensenar-a-los-ninos-como-actuar-en-casos-de-emergencia/