Independent: In a speech at the Brandenburg Gate that instantly invited comparisons with visits to the same spot by some of his predecessors, President Barack Obama sought to make a historic imprint of his own, pledging to forge a new pact with Russia to further cut nuclear arsenals and to step up the fight against global warming.
President Obama, behind a screen of bullet-proof glass and perspiring under a hot sun, invoked Europes difficult past when it was divided by the wall that once bisected Berlin and...