Overcoming their surprise when Tsipras failed to present them with a detailed plan, the leaders reluctantly agreed to a final summit Sunday, saying that could give both sides an opportunity to stave off collapse of the struggling but defiant member nation.
Underscoring the gravity of the challenge, European Union President Donald Tusk decided to call all 28 EU leaders to Brussels instead of only the 19 eurozone members, because, for the bloc, it "is maybe the most critical moment in our history."
