United States September 16, 2019 11:20 pm A Maryland Doctor's Warning About Dangers of Vaping A local surgeon is warning people about the dangers of vaping and the damage he’s seen firsthand. News4’s Doreen Gentzler reports. 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