 Hundreds of flights already canceled today, many of them on Delta. The airline had to cancel about 1,400 flights Sunday. Residual effects of the crowd strike update fail. This is ABC News. Sneezing, coughing, stuffy nose, runny nose, post-nasal drip, interrupted sleeping. I just was groggy at the end of the day. Allergies and sinus congestion were making Jana miserable. Then, a