Crown Prince Guillaume (centre) looks at a picture of Étienne Schneider, Luxembourg’s deputy prime minister and economy minister, during a visit to the offices of Planetary Resources, in the Seattle region, on 10 April 2017 SIP/Jean-Christophe Verhaegen

Crown Prince Guillaume (centre) looks at a picture of Étienne Schneider, Luxembourg’s deputy prime minister and economy minister, during a visit to the offices of Planetary Resources, in the Seattle region, on 10 April 2017 SIP/Jean-Christophe Verhaegen