Spatial Ed

The only way to get the facts is to bring the president under impeachment.  Then congress can subpoena this guy, Ben Gazi, and find out what he knows and when did he know it.

All this talk about an expensive investigation when all the facts will come out in the impeachment hearings.  Draw up the articles of impeachment already.

contemplate this folks, impeach Obama and you get Biden, do you REALLY want that?

Both parties should be disbanded for corruption....   

And replaced with?

Pressure differential. It's how aircraft pitot tubes work. Static pressure vs. ram pressure. Independent on altitude. So reading your wind instruments whether based on a anemometer or a pitot tube, you should get similar readings. However the boat and sails will load up differently on the same wind speed at different density altitudes. Aircraft face the same issues. The higher you fly, the less efficient the plane is, but goes faster due to the thinner air. But climb performance suffers. Many Texas flyers come to Colorado to die in our mountains because they don't respect that.

 
   It measures pressure, not speed then. You don't use a different Vy below 10,000 right?  

Negative ghost rider. Vy doesn't change with density altitude, but take off and performance numbers do. A plane still works the same at the same airspeeds, there's just a different density of air molecules to work with. Temp plays a key component in the equation too.