Feb. 12 (UPI) -- Leaders of 27 European Union countries were holed up in a 16th-century castle on the Belgian-Netherlands border Thursday for an emergency brainstorming session on ways to boost the bloc's weak economy, slash red tape and compete with the United States and China for investment. Prospects for a breakthrough were not high due to major differences over how far and fast to proceed, with French President Emmanuel Macron and German Chancellor Friedrich Merz pushing for the EU to step