Europe demands answers after US-Danish spying claims

France warned Monday that alleged US spying on European allies using Danish underwater cables would be "extremely serious" if confirmed, as questions mounted over whether Denmark knew what the US was doing. In an investigative report on Sunday, Danish public broadcaster Danmarks Radio (DR) revealed together with several other European media outlets that the US National Security Agency (NSA) had eavesdropped on Danish underwater internet cables from 2012 to 2014 to spy on top politicians in Germany, Sweden, Norway and France. FRANCE 24's International Affairs Editor Philip Turle explains.