After Trump's spending demands, NATO summit turns to AfghanistanBy Robin Emmott BRUSSELS (Reuters) - NATO leaders will try on Thursday to move beyond Donald Trump's demands for higher defense spending, and focus on ending the long war in Afghanistan, in the second day of a summit in Brussels underscored by transatlantic tensions. On a trip that will also take the U.S. president to Britain and to Helsinki to meet Russia's Vladimir Putin, Trump spent the first day of the NATO summit lambasting allies for failing to spend the targeted 2 percent of GDP on defense and accused Germany of being a prisoner to Russian energy. On day two, leaders will welcome non-NATO partners including Afghan President Ashraf Ghani and Ukraine's Petro Poroshenko to the alliance's new glass-and-steel headquarters as they seek to focus on policy rather than politics.