By Aislinn Laing, Andrea Shalal and Robin Emmott MADRID (Reuters) -U.S. President Joe Biden pledged more American troops, warplanes and warships for Europe on Wednesday as NATO agreed the biggest strengthening of its deterrents since the Cold War in response to Russia’s invasion of Ukraine. Biden’s commitment at the Madrid summit “to defend every inch of allied territory” came as the U.S.-led military alliance also set in motion a new plan to reinforce the Baltic states and Poland against any future Russian attack. With more German, British and other allied troops to be on alert to deploy east…