In Laredo, Texas, during the summer of 1993, U.S. Treasury officials seized a yellow school bus full of aid for Cuba, claiming that Fidel Castro could use it as a military vehicle. The 13 “caravanistas” on the school bus refused to get off and began a fast until it was released. For 23 days the bus sat in the Texas heat. Walker called upon the extensive network that IFCO had built up through the years of the Pastors for Peace caravans, and Washington was inundated with calls about “the little yellow school bus.” Demonstrations were held in 20 cities, and a solidarity fast was held in Havana in front of the U.S. Interests Section. The bus was finally released. It was taken across the border with the rest of the caravan, eventually making it to Cuba where it has been serving the needs of the Martin Luther King Center in Havana ever since.