April 5, 2019 5:47 pm MIA Concessionaires Automatically Bill Gratuity Charge Concessionaires at Miami International Airport had been automatically billing an 18% gratuity charge to customers. NBC 6’s Nathalia Ortiz reports. US & World Videos 0:29 DeSantis announces Freedom Month Sales Tax Holiday for Florida families 0:47 Police deploy tear gas, arrest 10 people at USF during protest 1:35 6 to know – Top stories of the day 1:04 Tour bus driver speaks out about inferno on I-595 0:47 Video shows woman hurling bowling ball at another's head in Brickell