Flowers and an iPad showing a picture of Steve Jobs are placed at a makeshift memorial for Steve Jobs at the Apple headquarters on October 5, 2011 in Cupertino, California. Jobs, 56, passed away after a long battle with pancreatic cancer... (Photo by Kevork Djansezian/Getty Images)

Emergency crews battle a running wildfire on April 19, 2011 in Strawn, Texas. Dozens of area homes have been destroyed in the wildfires that have been fueled by dry conditions, high winds, and low humidity. (Photo by Tom Pennington/Getty Images)

A member from the Iraqi security forces beats an Islamic State insurgent, who was captured in Tikrit April 1, 2015. Iraqi troops and Shi'ite paramilitary fighters were battling Islamic State on Wednesday in northern Tikrit, which officials described as the Sunni Muslim militant group's last stronghold in the city. (Photo by Alaa Al-Marjani/Reuters)

Mexicans dressed as French soldiers carry handcrafted guns, ahead of a reenactment of the battle of Puebla between Zacapoaxtla Indians and the French army during Cinco de Mayo celebrations in Mexico City, Tuesday, May 5, 2015. Monsalvo said he has been portraying Napoleon III in the annual neighborhood event for 28 years. Cinco de Mayo commemorates the victory of an ill-equipped Mexican army over French troops in Puebla on May 5, 1862. (Photo by Rebecca Blackwell/AP Photo)

The Red Arrows make a flypast during the Trooping The Colour parade at Buckingham Palace, in London, Saturday, June 13, 2015. Hundreds of soldiers in ceremonial dress have marched in London in the annual Trooping the Color parade to mark the official birthday of Queen Elizabeth II. The Trooping the Color tradition originates from preparations for battle, when flags were carried or "trooped" down the rank for soldiers to see. (AP Photo/Tim Ireland)

A participant in the traditional dance of Los Historiantes poses for a picture prior to performing in the festivity held in the honour of Saint James, in Santiago Nonualco July 22, 2015. The traditional dance was brought to Latin America by the Spanish, and participants each dramatise an episode of the battles between the Christians and the Moors that took place on the Iberian Peninsula about eight centuries ago, according to the dancers. (Photo by Jose Cabezas/Reuters)

June 21: “World War Z”. Brad Pitt battles zombie apocalypse in $170 million film by “Quantum of Solace” director Marc Forster. This publicity photo released by Paramount Pictures shows, center, Brad Pitt as Gerald Lane in a scene from the film, “World War Z”, from Paramount Pictures and Skydance Productions in association with Hemisphere Media Capital and GK Films. (Photo by Jaap Buitendijk/AP Photo/Paramount Pictures)

Two Herens cows lock horns during the qualification round of the annual “Battle of the Queens” cow fight finals in Aproz, in the western Alpine canton of Valais May 5, 2013. Each year when taken to the alpine pastures, the cows test their strength and fight for the herd's leadership. The competition continues until a new queen has forced all the other cows to retreat. (Photo by Valentin Flauraud/Reuters)