MINNEAPOLIS — Crews on Thursday removed the concrete barriers that blocked traffic at a Minneapolis intersection where a memorial to George Floyd was assembled after his death last year, but community activists quickly put up makeshift barriers and resumed chanting the name of the Black man whose killing galvanized the racial justice movement. It took the crews led by a community group known as Agape less than four hours to clear the barriers, artwork, flowers and other items from 38th Street and Chicago Avenue where Floyd was killed, informally known as George Floyd Square. City spokeswoman Sarah McKenzie said a fist sculpture, which stands several feet tall, will remain.