A bull elephant grazes in South Africa's Kruger National Park, December 10, 2009. REUTERS/Mike Hutchings/File Photo

A herd of elephants walk past a watering hole in Hwange National Park, Zimbabwe, October 14, 2014. REUTERS/Philimon Bulawayo/File Photo

A bird flies near the carcass of an elephant, which was killed after drinking from a poisoned water hole, in Zimbabwe's Hwange National Park, September 27, 2013. REUTERS/Philimon Bulawayo/File Photo

The logo on a Wells Fargo bank building is seen in downtown San Diego, California March 18, 2014. REUTERS/Mike Blake

An employee demonstrates the SupervisIR, a ground-based infrared surveillance system, during a preview presentation at Elbit Systems, Israel's biggest publicly listed defense firm, in Netanya, Israel June 8, 2016. REUTERS/Baz Ratner/File Photo

Visitors watch a demonstration at the Israel Aerospace Industries (IAI) booth in the IMDEX Asia maritime defence exhibition in Singapore May 19, 2015. REUTERS/Edgar Su/File Photo

An employee looks through an infrared scope placed on a weapon during a demonstration at a preview presentation at Elbit Systems, Israel's biggest publicly listed defense firm, in Netanya, Israel June 8, 2016. REUTERS/Baz Ratner/File Photo

A view of the exterior of the JP Morgan Chase & Co. Corporate headquarters in the Manhattan borough of New York City, May 20, 2015. REUTERS/Mike Segar