US President Barack Obama said on Friday that US-European relations had been allowed to "drift", hitting out at anti-European feeling in the United States and "insidious" anti-Americanism on the continent.
"We must be honest with ourselves," Obama said, in remarks meant to help in a new rapprochement between the United States and Europe following the tensions which soured the administration of former president George W. Bush.
"In recent years, we've allowed our alliance to drift," Obama said in a campaign-style town hall meeting on the France-Germany border city of Strasbourg, ahead of the 60th anniversary NATO summit.
"I know that there have been honest disagreements over policies, but we also know there is something more that has crept into our relationship.
"In America, there's a failure to appreciate Europe's leading role in the world, instead of celebrating your dynamic union and seeking to partner with you to meet common challenges, there have been times where America's showed arrogance."
But he warned that in Europe "there is an anti-Americanism that is at once casual but can also be insidious."