An Iranian boy flies a kite during the ancient festival of Sizdeh Bedar, an annual public picnic day on the 13th day of the Iranian new year at Pardisan Park in Tehran, Iran on Wednesday, April 2, 2014. Sizdeh Bedar, which comes from the Farsi words for “thirteen” and “day out,” is a legacy from Iran’s pre-Islamic past that hard-liners in the Islamic Republic never managed to erase from calendars. Many say it’s bad luck to stay indoors for the holiday. (AP Photo/Vahid Salemi)

Emily Herren takes a picture with her phone as she visits the Flower Fields, Wednesday, April 2, 2014, in Carlsbad, California. A longtime Southern California attraction, the April blooms of colorful Ranunculus flowers at this roadside farm are a springtime tradition. (AP Photo/Gregory Bull)

A worker attaches the name tag of a Buddhist who made donation to a lantern for upcoming celebration of Buddha’s birthday at the Jogye temple in Seoul, South Korea on Thursday, April 3, 2014. (AP Photo/Ahn Young-joon)

Aaron Pierice the greenhouse manger at Jerry’s For All Seasons holds a buff orpington chick in preparation of Jerry’s annual Easter egg hunt in Dunmore, Pa., on Wednesday, April 2, 2014. (AP/The Times-Tribune, Jake Danna Stevens)

Residents walk on a street during a sandstorm in Hami, northwestern China’s Xinjiang Uyghur autonomous region on April 3, 2014. Hami issued an “orange alert” for a sandstorm on April 3, warning residents to reduce outdoor activities and avoid dangerous jobs. (AFP/Getty Images)

Luci Hamlin and her husband Specialist Timothy Hamlin wait to get back to their home on base at Fort Hood, Texas, April 2, 2014. Several people were killed and at least 14 injured on Wednesday when a gunman opened fire at a U.S. Army base in Fort Hood, Texas, the site of another rampage in 2009, U.S. officials said. (REUTERS/Austin American-Statesman/Deborah Cannon)

Fighters from the Free Syrian Army’s Al Rahman legion fire a weapon in Mleha suburb of Damascus during what the rebel fighters said was an offensive against them by forces loyal to Syria’s President Bashar al-Assad on April 2, 2014. (REUTERS/Bassam Khabieh)

A girl reads a book on her balcony as smoke rises from chimneys of a steel plant, on a hazy day in Quzhou, Zhejiang province on April 3, 2014. China’s plan for a market in air pollution permits promises to help clean up its air cheaply, but the move could prove just as useless as previous environmental policies unless the government stamps out lax enforcement and spotty data. (Reuters)

Residents walk to higher ground after a 7.6 magnitude quake, following Tuesday’s earthquake and tsunami, in the northern port of Iquique April 2, 2014. There were no reports of casualties or damage to infrastructure after the powerful 7.6 magnitude quake that triggered a tsunami alert, Chile’s Onemi emergency office told Reuters on Thursday. The quake struck off northern Chile late on Wednesday, prompting tsunami alerts and evacuations along the coast and in neighboring Peru. (Ivan Alvarado/Reuters)

Afghan election commission workers move ballot boxes and election material in a warehouse in Kabul April 3, 2014. The Afghan presidential elections will be held on April 5.  (Mohammad Ismail/Reuters)