EDS NOTE : SPANISH LAW REQUIRES THAT THE FACES OF MINORS ARE MASKED IN PUBLICATIONS WITHIN SPAIN Members of a casteller form a human tower or &quot;castell&quot; in Sant Jaume square in Barcelona, Spain, Sunday, Sept. 24, 2017. Grassroots groups driving Catalonia's independence movement say they have started distributing one million ballots to be used in a referendum on secession that the Spanish government has vowed to stop. (AP Photo/Emilio Morenatti)