Ok so after doing some research (aka 5 minutes of google search) I found out that MacDill Airforce base is home to the U.S. Special Operations Command and they do a shit ton of UAV/Drone/Special plane testing. With them being located only a few miles of downtown Tampa it would say it not unusual for someone in the area to see some unusual activity. So while I can't say for sure they're not targeting you specifically, you can at least take solace in the fact it's just Obama watching you and not aliens.