DETROIT — The bus driver made a mistake; there was no turning back. Fifty Mexican immigrants, none of them documented citizens and only three with Green Cards, were on a bus from the Hispanic Center in Grand Rapids destined for the Mexican Consulate in Detroit Thursday when they found themselves unexpectedly under the scrutiny of Canadian border officials. Ariel Moutsatsos, the minister of press for the Embassy of Mexico in Washington D.C., says the bus driver "made the wrong decision" and inadvertently took the highway onto the the Ambassador Bridge connecting Detroit to Windsor, Ontario. Once on the bridge, vehicles...