1. at the moment there is no probability measurement that can say the u.s. citizen will experience man made global warming. How many times do I have to tell you there is no peer reviewed science saying man made co2 is causing warming. Since there is no science saying it... there is no way to put a probability on it. 2. the screening period was reduce to 3 month according to this. https://www.numbersusa.com/news/pres-obama-reduces-syrian-refugee-screening-process-3-months 3. How many times do we have to explain to you fools that you can't put a probability function on terror when the terrorists are trying to get dirty bombs, nukes and bio weapons. Are you all that dense. 4. Why risk lives at all. Why not help the people in or near their homelands... we don't need more people to dilute wages and votes here in america.
Why do you continuously post a site that is maintained by a bunch of graduate students from the California Institute of Technology that has no involvement from NASA employees?