A couple covered with the US and the pride flags pay their tribute for the victims of a 12 June mass shooting in Orlando, Florida, USA, as they look at the Eiffel tower, illuminated in rainbow colours, in Paris, France, 13 June 2016. A total of 50 people including the suspect were killed and 53 were injured in a shooting attack at an LGBT club in Orlando, Florida, in the early hours of 12 June. The shooter was killed in an exchange of fire with the police after taking hostages at the club. (Photo by Yoan Valat/EPA)





St Georges Hall is illuminated with a rainbow flag in Liverpool, northern England, June 13, 2016. (Photo by Phil Noble/Reuters)





The spire of One World Trade Center is lit in rainbow colors to honor the victims of the Orlando shooting massacre at the Pulse nightclub, in the Manhattan borough of New York, U.S., June 13, 2016. (Photo by Andrew Kelly/Reuters)





People take part in a candlelight memorial service the day after a mass shooting at the Pulse gay nightclub in Orlando, Florida, U.S. June 13, 2016. (Photo by Carlo Allegri/Reuters)





Boston's City Hall is lit in the colors of the pride flag for the victims of the mass shooting at Orlando's Pulse nightclub, in Boston, Massachusetts, U.S. June 13, 2016. (Photo by Gretchen Ertl/Reuters)





Madison Square Garden is lit in rainbow colors to honor the victims of the Orlando shooting massacre at the Pulse nightclub, in the Manhattan borough of New York, U.S., June 13, 2016. (Photo by Andrew Kelly/Reuters)





Mexico's Foreign Affairs building is illuminated in rainbow colours in tribute of the victims of the gay nightclub mass shooting in Orlando, in Mexico City, Mexico, June 13, 2016. (Photo by Edgard Garrido/Reuters)





The Helmsley Building is lit in rainbow colors to honor the victims of the Orlando shooting massacre at the Pulse nightclub, in the Manhattan borough of New York, U.S., June 14, 2016. (Photo by Andrew Kelly/Reuters)





The Eiffel Tower is illuminated in memory of the victims of the gay nightclub mass shooting in Orlando, in Paris, France, June 13, 2016. Picture taken with long exposure and a zoom lens. (Photo by Gonzalo Fuentes/Reuters)





The Sydney Harbour Bridge is lit in rainbow colors in Sydney, Australia, June 13, 2016. (Photo by Sam Mooy/Reuters/AAP)





St Georges Hall is illuminated with a rainbow flag in Liverpool, northern England, June 13, 2016. (Photo by Phil Noble/Reuters)





The Colpatria tower is lit in rainbow colors to honor the victims of the Orlando shooting massacre at the Pulse nightclub, in Bogota, Colombia June 14, 2016. (Photo by John Vizcaino/Reuters)