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criticism for mixed messaging. joining me now is dr. jeanette nesheiwat, fox news medical contributor, also a family and emergency medicine physician. so, dr. jeanette, cdc messaging is confusing. what does the american public need to know about testing for covid-19? sure. so for testing, if you test positive for covid, for example, if you re having symptoms fever ors runny nose, cough, con congestion you re supposed to quarantine for five days so we can try to minimize the spread of virus to others. after five days if you re feeling better and you have no m symptoms, you have no cough, no fever, if you have access to a test, that s great, you can test. if you re still positive, then you have to quarantine for another five days. but if you don t have access and you don t have symptoms after five days, then you can go back to work. you just have to wear your max for an additional five days.
steve? reporter: jon, watching these counterterrorism exercises can really get your heartbeating, and that s the goal, is to take these federal responders and put them in situations of real pressure. let s go. [gunfire] reporter: at the federal law enforcement training center in brunswick, georgia, they use blank ammunition police! reporter: but real actors. you can t simulate behavior. you have to use people to simulate behavior. reporter: 60,000 federal agents a year come to the 1600-acre site complete with mock airplanes, a test track. the important thing in performing a pit maneuver is location. no embankments, no bridges and no con congestion. terror attempts from the past are rehearsed alongside potential future attacks like