Spanish King Felipe (L) and Netherlands King Willem-Alexander tour of the test center of the European Space Research and Technology Center (ESTEC) in Noordwijk on April 18, 2024. The Spanish royal couple are on a two-day state visit to the Netherlands. (Photo by Koen van Weel / ANP / AFP) / Netherlands OUT (Photo by KOEN VAN WEEL/ANP/AFP via Getty Images)