The European Union failed to secure backing from all 27 countries to change the EU treaty at a summit Friday, meaning any deal will now likely involve the 17 euro zone countries plus any others that want to join, three EU diplomats said. An agreement at 27 fell through after British Prime Minister David Cameron demanded concessions that Germany and France were not willing to give, one of the officials said. During nearly 10 hours of talks that lasted into the night, EU leaders did manage to reach agreement on a ceiling for the size of the euro zone's permanent bailout fund, the ESM, saying it would be capped at 500 ... (full story)