Opposition supporters affected by tear gas try to leave on a motorcycle during clashes with riot policemen during a rally demanding a referendum to remove Venezuela's President Nicolas Maduro in Caracas, Venezuela, May 18, 2016. REUTERS/Marco Bello
An image of the Snapchat logo created with Post-it notes is seen in the windows of Havas Worldwide at 200 Hudson Street in lower Manhattan, New York, May 18, 2016, where advertising agencies and other companies have started what is being called a "Post-it note war" with employees creating colorful images in their windows with Post-it notes. REUTERS/Mike Segar
A paddle boarder makes his way to the water as the space shuttle fuel tank ET-94 arrives by barge for its eventual placement at the California Science Center in Marina del Rey, California, May 18, 2016. REUTERS/Gene Blevins
Britain's Queen Elizabeth reads the Queen's Speech during the State Opening of Parliament in the House of Lords in London, Britain May 18, 2016. REUTERS/Alastair Grant/Pool
Chicks dyed to draw attention are offered for sale at a small poultry market in Jakarta, Indonesia May 18, 2016. REUTERS/Darren Whiteside
Supreme Court nominee Merrick Garland, chief judge of the D.C. Circuit Court, looks at a picture as he waits for a meeting with Senator Tom Udall (D-NM) (not pictured) at Hart Senate Office Building in Capitol Hill in Washington, U.S. May 18, 2016. REUTERS/Carlos Barria
An image of Spider Man created with Post-it notes is seen in windows at 200 Hudson street in lower Manhattan, New York, May 18, 2016. REUTERS/Mike Segar
Model Bella Hadid poses on the red carpet as she arrives for the screening of the film "La fille inconnue" (The Unknown Girl) in competition at the 69th Cannes Film Festival in Cannes, France, May 18, 2016. REUTERS/Jean-Paul Pelissier
New York Police Department officers stand around a covered body after a shooting in midtown Manhattan in New York, U.S., May 18, 2016. REUTERS/Lucas Jackson
Models pose against the backdrop of an old sandstone chapel during a fashion show for the label Romance Was Born on the waterfront of Sydney Harbour during Australian Fashion Week, Sydney, Australia May 18, 2016. REUTERS/Jason Reed
Pope Francis gestures at the end of the weekly audience in Saint Peter's Square at the Vatican May 18, 2016. REUTERS/Max Rossi
Members of the Lords gather to witness Yeoman warders take part in the traditional "ceremonial search" in the Prince's chamber in the houses of Parliament before the State Opening of Parliament in the House of Lords in London, Britain May 18, 2016. REUTERS/Richard Pohle/Pool
A protester against visiting Zhang Dejiang, the chairman of China's National People's Congress, confronts police in Hong Kong May 18, 2016. REUTERS/Paul Yeung
Britain's Queen Elizabeth is driven by carriage from Buckingham Palace to the Houses of Parliament for the State Opening of Parliament in central London, Britain May 18, 2016. REUTERS/Paul Hackett
Homeless couple Kiran Rana (R) and Vishal Rana (L) help their son Kanish Rana, 6, with his studies outside a closed shop on a pavement in Kolkata, India May 18, 2016. REUTERS/Rupak De Chowdhuri
A police car burns during a demonstration against police violence and against French labor law reform in Paris, France, May 18, 2016. REUTERS/Charles Platiau
Britain's Queen Elizabeth is seen on a screen as she delivers her speech during the State Opening of Parliament in the House of Lords, at the Palace of Westminster in London, Britain May 18, 2016. REUTERS/Toby Melville