Belgian soldiers patrol on Brussels Grand Place after security was tightened in Belgium following the fatal attacks in Paris on Friday, in Brussels, Belgium, November 20, 2015. REUTERS/Yves Herman – RTS83UQ

Belgian soldiers patrol on Brussels Grand Place after security was tightened in Belgium following the fatal attacks in Paris on Friday, in Brussels, Belgium, November 20, 2015. REUTERS/Yves Herman – RTS83UQ