Warsaw Summit

Russian aggression, radical Islamist terrorism, the refugee crisis, Brexit, Afghanistan. The list of challenges NATO leaders faced at the biennial summit here over the weekend was diverse, highlighting what some consider to be a post-Cold War moment of truth for the alliance to prove it still matters.

Russian aggression, radical Islamist terrorism, the refugee crisis, Brexit, Afghanistan. The list of challenges NATO leaders faced at the biennial summit here over the weekend was diverse, highlighting what some consider to be a post-Cold War moment of truth for the alliance to prove it still matters.