World reacts to Orlando shooting

One World Trade Center in New York is lit in rainbow colors on Sunday in response to the mass shooting at a gay nightclub in Orlando, Florida.

A rainbow flag is held up during a vigil in front of the White House in Washington on Sunday. 

Tel Aviv City Hall lit up with rainbow flag colors

Sydney Town Hall illuminated pink to remember victims of the Orlando night club massacre.

A rainbow flag flies at half mast on the Space Needle in Seattle.

The Orlando Eye observation wheel lit up in rainbow colors on Sunday to remember victims at the city's Pulse nightclub. 

New York City Hall in downtown Manhattan on Sunday. 

The Sydney Harbour Bridge on Monday. 

The Michael Fowler Center during a candlelight vigil on Monday

American flags and a rainbow banners hang at the Paris City Hall Monday.

Flags lowered to half-staff on the Washington Monument grounds. 

The High Roller observation wheel pays tribute to Orlando victims at The Linq Hotel & Casino in Las Vegas. 

A rainbow appears behind the U.S. flag flying at half-staff on top of the Tacoma Dome, on June 13, 2016, in Tacoma, Washington.

The Eiffel tower is illuminated in rainbow colors in honor of the victims of the June 12th mass shooting in Paris, France.

The buildings on Grand Place, the central square of Brussels, are lit up in the colors of the LGBT rainbow flag on June 13, 2016 in support of the victims of Orlando shootings.

Los Angeles Hall is lit in the colors of the rainbow flag to honor the LGBT victims on June 13, 2016 in Los Angeles, California.

St Georges Hall is illuminated with a rainbow flag following a vigil in memory of the victims of the gay nightclub mass shooting in Orlando, in Liverpool, northern England on June 13, 2016.

The Helmsley Building in New York is lit in rainbow colors to honor the victims of the Orlando shooting massacre at the Pulse nightclub.

A lantern is released and flies over a hotel lit in rainbow colors after an evening memorial service for the victims of the Pulse Nightclub shootings, at the Dr. Phillips Center for the Performing Arts on June 13, 2016 in Orlando, Florida.

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, on June 13, 2016.

People stand in front of the Royal Palace at Dam Square in Amsterdam as it is illuminated in rainbow colors to pay homage to the victims of a shooting at a gay nightclub in Orlando.

The Piazza del Plebiscito in Naples Italy is illuminated with the colors of rainbow to honor victims of a shooting massacre a day earlier in Orlando, in Naples, Italy on June 13, 2016.