'No turning back' on Brexit as Article 50 triggered; Merkel Rejects Post-Breakup Relationship Talks

``[May] was speaking after Britain's EU ambassador formally triggered the two year exit process by handing a letter to EU Council President Donald Tusk. A sombre-looking Mr Tusk said it was not a "happy day" for him or the EU. The European Parliament warned security cooperation was not on the table as it fired its opening salvo in what are expected to be tough negotiations. '' -- See also Angela Merkel rejects one of Theresa May's key Brexit demands.