ALCORCON, SPAIN - JUNE 16:  In this photo illustration, the Spanish newspaper ABC displays the cover headline 'La visita de Cameron hoy a Gibraltar enoja a Espana' (Cameron's visit to Gibraltar today angers Spain) and La Razon's headline 'Espana pedira la soberania de Gibraltar si gana el Brexit' (Spain will claim Gibraltar's sovereignty if Brexit wins) in reference to the upcoming referendum in Great Britain over whether to remain in the European Union are displayed amid other covers on a table on June 16, 2016 in Alcorcon, Madrid. Many analysts predict a Brexit could spur other member states to hold their own referendums. British Prime Minister David Cameron visits today Gibraltar looking for support on his campaign to stay in the European Union. (Photo Illustration by Pablo Blazquez Dominguez/Getty Images)