American Airlines flights resume after being grounded

American Airlines flights at Miami International Airport have resumed after they were grounded for several hours Thursday.Airport spokeswoman Susie Trutie said a computer glitch caused the delays, which lasted about two hours. Flights resumed about 1:30 p.m.The airline's official Twitter account cited "technical issues" as the reason for the halted flights."We have resolved connectivity issues that led to a ground stop today at our Chicago, Dallas-Fort Worth and Miami hubs," American Airlines Mi