WASHINGTON, DC - SEPTEMBER 09: Speaker of the House Paul Ryan (C) (R-WI) and House Minority Leader Nancy Pelosi (R) (D-CA) join members of the House of Representatives on the steps of the U.S. Capitol for a ceremony marking the 15th anniversary of the September 11th attacks September 9, 2016 in Washington, DC. Also pictured are House Majority Leader Kevin McCarthy (2nd R) R-CA) and House Democratic Whip Steny Hoyer (3nd L) (D-MD). (Photo by Win McNamee/Getty Images)

TOPSHOT - US Secretary of State John Kerry (L) and Russian Minister for Foreign Affairs Sergei Lavrov (R) pose prior to a meeting to discuss the Syrian crisis on September 9, 2016, in Geneva. The United States and Russia will make a fresh bid to end the bloodshed in Syria on September 9, 2016 as Moscow-backed regime forces make new advances against rebel fighters on the ground. US Secretary of State John Kerry flew into Geneva for crunch talks with his Russian counterpart Sergei Lavrov, with Washington warning talks could not go on forever without a breakthrough. The two powers back opposite sides in the five-year conflict, with Moscow supporting the regime of President Bashar al-Assad and the US behind the rebels. / AFP PHOTO / POOL / KEVIN LAMARQUEKEVIN LAMARQUE/AFP/Getty Images

US Secretary of State John Kerry speaks prior to a meeting to discuss the Syrian crisis with Russian Minister for Foreign Affairs Sergei Lavrov on September 9, 2016, in Geneva. The United States and Russia will make a fresh bid to end the bloodshed in Syria on September 9, 2016 as Moscow-backed regime forces make new advances against rebel fighters on the ground. US Secretary of State John Kerry flew into Geneva for crunch talks with his Russian counterpart Sergei Lavrov, with Washington warning talks could not go on forever without a breakthrough. The two powers back opposite sides in the five-year conflict, with Moscow supporting the regime of President Bashar al-Assad and the US behind the rebels. / AFP PHOTO / POOL / KEVIN LAMARQUEKEVIN LAMARQUE/AFP/Getty Images

US Secretary of State John Kerry (R) and Russian Minister for Foreign Affairs Sergei Lavrov (L) speak as they arrive for a meeting to discuss the Syrian crisis on September 9, 2016, in Geneva. The United States and Russia will make a fresh bid to end the bloodshed in Syria on September 9, 2016 as Moscow-backed regime forces make new advances against rebel fighters on the ground. US Secretary of State John Kerry flew into Geneva for crunch talks with his Russian counterpart Sergei Lavrov, with Washington warning talks could not go on forever without a breakthrough. The two powers back opposite sides in the five-year conflict, with Moscow supporting the regime of President Bashar al-Assad and the US behind the rebels. / AFP PHOTO / POOL / KEVIN LAMARQUEKEVIN LAMARQUE/AFP/Getty Images

US Secretary of State John Kerry (L) and Russian Minister for Foreign Affairs Sergei Lavrov (R) speak as they arrive prior to a meeting to discuss the Syrian crisis on September 9, 2016, in Geneva. The United States and Russia will make a fresh bid to end the bloodshed in Syria on September 9, 2016 as Moscow-backed regime forces make new advances against rebel fighters on the ground. US Secretary of State John Kerry flew into Geneva for crunch talks with his Russian counterpart Sergei Lavrov, with Washington warning talks could not go on forever without a breakthrough. The two powers back opposite sides in the five-year conflict, with Moscow supporting the regime of President Bashar al-Assad and the US behind the rebels. / AFP PHOTO / POOL / KEVIN LAMARQUEKEVIN LAMARQUE/AFP/Getty Images

US Secretary of State John Kerry (L) gestures as he speaks while he arrives with Russian Minister for Foreign Affairs Sergei Lavrov (R) prior to a meeting to discuss the Syrian crisis on September 9, 2016, in Geneva. The United States and Russia will make a fresh bid to end the bloodshed in Syria on September 9, 2016 as Moscow-backed regime forces make new advances against rebel fighters on the ground. US Secretary of State John Kerry flew into Geneva for crunch talks with his Russian counterpart Sergei Lavrov, with Washington warning talks could not go on forever without a breakthrough. The two powers back opposite sides in the five-year conflict, with Moscow supporting the regime of President Bashar al-Assad and the US behind the rebels. / AFP PHOTO / POOL / KEVIN LAMARQUEKEVIN LAMARQUE/AFP/Getty Images

US Secretary of State John Kerry (L) and Russian Minister for Foreign Affairs Sergei Lavrov (R) speak as they arrive prior to a meeting to discuss the Syrian crisis on September 9, 2016, in Geneva. The United States and Russia will make a fresh bid to end the bloodshed in Syria on September 9, 2016 as Moscow-backed regime forces make new advances against rebel fighters on the ground. US Secretary of State John Kerry flew into Geneva for crunch talks with his Russian counterpart Sergei Lavrov, with Washington warning talks could not go on forever without a breakthrough. The two powers back opposite sides in the five-year conflict, with Moscow supporting the regime of President Bashar al-Assad and the US behind the rebels. / AFP PHOTO / POOL / KEVIN LAMARQUEKEVIN LAMARQUE/AFP/Getty Images

US Secretary of State John Kerry (L) and Russian Minister for Foreign Affairs Sergei Lavrov (R) speak as they arrive prior to a meeting to discuss the Syrian crisis on September 9, 2016, in Geneva. The United States and Russia will make a fresh bid to end the bloodshed in Syria on September 9, 2016 as Moscow-backed regime forces make new advances against rebel fighters on the ground. US Secretary of State John Kerry flew into Geneva for crunch talks with his Russian counterpart Sergei Lavrov, with Washington warning talks could not go on forever without a breakthrough. The two powers back opposite sides in the five-year conflict, with Moscow supporting the regime of President Bashar al-Assad and the US behind the rebels. / AFP PHOTO / POOL / KEVIN LAMARQUEKEVIN LAMARQUE/AFP/Getty Images