Jason Wright, seen here during his 15-month deployment to Iraq, served in the military for nine years before resigning last week. Courtesy of Jason Wright hide caption

itoggle caption Courtesy of Jason Wright

Smoke rises near a Syrian flag hoisted up a flagpole as a result of the fighting between Syrian rebels and the Syrian Army over the control of Quneitra crossing, on Saturday. The area is where dozens of U.N. peacekeepers had been under siege by Nusra Front fighters. Atef Safadi/EPA/Landov hide caption

itoggle caption Atef Safadi/EPA/Landov

An Israeli soldier launches a drone that's attached to a military vehicle in southern Israel, not far from the border with the Gaza Strip, on July 29. Israel was a pioneer with drones and has developed a number of military technologies that it later sells abroad. Jim Hollander/EPA/Landov hide caption

itoggle caption Jim Hollander/EPA/Landov

Britain's Prime Minister David Cameron speaks at a news conference in London on Friday after the U.K. raised its terror alert level. Paul Hackett/PA Photos/Landov hide caption

itoggle caption Paul Hackett/PA Photos/Landov

An Iraqi child walks next an empty house of a Christian family in Mosul on Aug. 8. The Arabic writing on the wall reads "Real Estate of the Islamic State." The extremist group took control of Mosul, Iraq's second largest city, in June. STR/EPA/Landov hide caption

itoggle caption STR/EPA/Landov

This image, posted on a militant website, shows an Islamic State fighter waving a flag from a captured government fighter jet in Raqqa, Syria. The group is well-funded and has gained territory over the past few months; that's raised some concerns in America, although experts say the organization is largely focused on regional goals. AP hide caption

itoggle caption AP