With the political conventions just around the corner, the FAA has issued notams for large, presidential-like temporary flight restrictions (TFRs). The Democratic National Convention takes place from Aug. 25 through 28 in Denver. See the FAA flight advisory. Because TFR airspace frequently changes, AOPA strongly encourages pilots to obtain a briefing and check notams before every flight. TFR violators will be intercepted and forced to land. Read more on AOPA Online.