FULL TITLE: Caravan's plea for buses is DENIED: Migrants must walk the remaining 900 miles to nearest US border as Mexico ignores demand for transport Exhausted men, women and children traveling in the largest of the four caravans headed to the US resumed their journey on foot before dawn Thursday after Mexican authorities refused to provide them with buses. The migrants planned to take advantage of cool overnight and morning temperatures by hitting the road at 3am in Juchitan for a trek to the town of Matias Romero en route to the Gulf coast city of Veracruz, which is a...