Environment

Moore Tornado Anniversary Photo Gallery.JPEG-0f209.jpg

This aerial photo combination shows the damage to the Moore Medical Center Emergency Services on May 21, 2013, after a massive tornado hit Moore, Okla., the day before, top, and the same view on May 15, 2014, bottom. (AP Photo)

Moore Tornado Anniversary Photo Gallery.JPEG-0fa9b.jpg

This combination of aerial photos shows the damage to homes and businesses on May 21, 2013, the day after a massive tornado hit Moore, Okla., top, and the same neighborhood under reconstruction on May 15, 2014, bottom. (AP Photo)

Moore Tornado Anniversary Photo Gallery.JPEG-0c848.jpg

In this photo combination, Rick Brown puts on a pair of boots after finding them in his tornado-ravaged home in Moore, Okla., on May 22, 2013, top, and sits on the now-cleared lot on May 8, 2014, bottom. Brown said construction should start soon on a new home to replace the one destroyed by the massive tornado that tore a wide swath through the Oklahoma City suburb on May 20, 2013. (AP Photo/Charlie Riedel)

Moore Tornado Anniversary Photo Gallery.JPEG-03426.jpg

In this photo combination, Kevin Kressler carries away debris at his tornado-ravaged home on May 25, 2013, in Moore, Okla., top. Kressler stands for a photo in front of his new home on May, 8, 2014, bottom. Kressler was one of the first residents to move back to his neighborhood after a massive tornado on May 20, 2013, leveled blocks around him in the Oklahoma City suburb. (AP Photo/Charlie Riedel)

Moore Tornado Anniversary Photo Gallery.JPEG-00321.jpg

In this photo combination, Katie Thomas sorts through debris at a friend's tornado-ravaged daycare on May 21, 2013, in Moore, Okla., top. A concrete slab is all that remains of the shopping center that contained the daycare on May, 8, 2014, bottom. (AP Photo/Charlie Riedel)

20140519-national-news-cover.jpg

National Edition News cover for May 19, 2014 - Corporations hoard cash away from high U.S. taxes: A customer gets help with products at an Apple store in Beijing, China, Tuesday, April 22, 2014. As part of Apple's new initiative timed to coincide with Tuesday's celebration of the annual Earth Day, it is offering free recycling of all its used products and vows to power all of its stores, offices and data centers with renewable energy to reduce the pollution caused by its devices and online services. (AP Photo/Ng Han Guan)

South Korea Ship Sinks.JPEG-04c09.jpg

South Korean President Park Geun-hye weeps while delivering a speech to the nation about the sunken ferry Sewol at the presidential Blue House in Seoul, South Korea, Monday, May 19, 2014. South Korea's president said Monday she will push to disband the coast guard in the wake of last month's ferry disaster that left more than 300 people dead or missing, calling its rescue operations after the disaster a failure. (AP Photo/Yonhap, Do Kwang-hwan) KOREA OUT