At home Friday morning, Flor Ramirez moved between chores and preparations for the afternoon May Day march — packing tamales and cleaning out the family van to make sure there was enough room for the kids plus a friend she planned to pick up. Yessari, her 8-year-old daughter, said she especially liked watching her mother figure out how they’re going to dress up for the rally.Last year, Flor Ramirez made butterflies for Yessari and her sister Saori to wear on their heads. “The butterflies symboli...