March 2, 2015 5:00 pm Consumer Report: Costco Credit Cards News4’s Consumer Reporter Erika Gonzalez explains why you won’t be able to use your American Express card at the popular warehouse club, Costco. Local 1:37 Pro-Palestinian protesters gather outside White House correspondents' dinner 0:43 American University locked down before man arrested on campus 3:08 Family holds memorial for brothers, 3 and 6, who died after Clifton house fire 2:05 ‘People immediately hit the ground': 6 hurt in shooting outside DC nightclub 2:20 Driver accused of deadly hit and run of skateboarder held without bail