MADRID, SPAIN - MARCH 08: Queen Letizia of Spain attends tribute concert 'In Memoriam' for terrorism victims at the Auditorio Nacional de Musica on March 8, 2017 in Madrid, Spain. (Photo by Carlos Alvarez/Getty Images)
MADRID, SPAIN - MARCH 08: Queen Letizia of Spain attends tribute concert 'In Memoriam' for terrorism victims at the Auditorio Nacional de Musica on March 8, 2017 in Madrid, Spain. (Photo by Carlos Alvarez/Getty Images)