Irish border riddle still confounds the Brexit experts

In announcing Monday that he hopes to break the Brexit deadlock by next month, Prime Minister Boris Johnson is seeking to solve in a matter of weeks a puzzle that has troubled European and British specialists for more than two years.Before negotiations on Britain's departure from the European Union even began in 2017, the vexing issue of how to keep goods flowing seamlessly between EU member Ireland and Northern Ireland when it leaves along with the rest of the U.K. — without time-consumin