 WTOP's Monday News, 10 and 40 past the hour. Here's Jeff Claybaugh. If you're flying this summer, beware. Delays are still stubbornly high. Flight awareness so far this year, about 21% of domestic flights have been delayed. Baltimore's Horseshoe Casino continues its slump. Gaming revenue at Horseshoe was down 12% from a year ago last month. Maryland's three smaller casinos now generate more gambling revenue than Horseshoe.