People stand in front of the Royal Palace at Dam Square in Amsterdam as it is illuminated in rainbow colours to pay homage to the victims of a shooting at a gay nighclub in Orlando. Forty-nine people were killed and 53 others wounded when a heavily armed gunman opened fire and seized hostages at a popular gay nightclub in Orlando, Florida -- the worst terror attack on US soil since September 11, 2001. / AFP / Evert Elzinga (Photo credit should read EVERT ELZINGA/AFP/Getty Images)
