Hundreds of thousands of people rallied in cities and towns across Greece on Friday to demand justice on the second anniversary of the country’s deadliest-ever train crash, and striking workers grounded flights and halted sea and train transport.

Also today: A US tent facility holds migrants longer than advised, and London’s Mayor eyes banning Oxford Street traffic.

Greek mass protests and a general strike Friday marking the second anniversary of a deadly train disaster morphed into violent Athens clashes between police and hundreds hooded, black-clad young protesters.