The US president got a ringing endorsement of his new Afghanistan strategy – but only 3,000 new, mostly non-combat troops.
The countries' full membership inches the Balkans closer to the borderless idea of Europe and further from the brutal wars of the 1990s.
Some advocate inviting Russia to join. Russian President Medvedev wants a new security architecture that includes his country.
In Strasbourg, the US president cast the war as an international – not just American – problem.
While the increase in soldiers is modest, the government is showing support for Obama's shift of strategy in Afghanistan – and, more broadly, for the administration itself.
As president heads to France, Europeans ask how best to respond to an ally that is suddenly sending all the signals it has hoped for.