What appeared to be hundreds of demonstrators occupied part of the Mall of America on Saturday to protest police killings of unarmed African-Americans. "While you are on your shopping spree, black people cannot breathe," they chanted. "That's why we're angry, that's why we're here. Santa won't see Tamir this year!" they chanted, in reference to 12-year-old Tamir Rice, who was shot dead by police in Cleveland because he was holding an airsoft gun. #handsupdontshoot Mall of America #BlackLivesMpls #BlackLivesMatter A video posted by Nekima Levy-Pounds (@nekimal) on Dec 12, 2014 at 12:14pm PST Ominous sign from Mall of America declares Final Warning to demonstrators.