JP-8 is like Jet A1 with a full additive package (Icing Bio etc). I was of the understanding that the USAF was to phased out JP-8 last year.
from
http://www.adtdl.army.mil/cgi-bin/at...0-67-2/ch2.htm
JP-8 is a kerosene base aviation turbine fuel procured under MIL-T-83133. Development of JP-8 is a result of battlefield damage that had shown JP-8 was inherently a safer fuel (for example, less susceptible to ignition and sustained fires). Also, JP-8 is essentially identical to JET A-1 and would be commercially available worldwide. The API gravity range for JP-8 is from 37.0 to 51.0. JP-8 is JET A (CONUS) or JET A-1 (OCONUS) combined with the additives: FSII, SDA and Corrosive Inhibitor. JP-8 has been established as the single fuel for the battlefield by DOD directive. JP-8 is used in both aviation turbine engines and compression ignition engines.
JET A (CONUS) and JET A-1 (OCONUS) aviation turbine fuel is essentially identical to JP-8 except it does not contain the three additives required in JP-8. JET A/JET A-1 is the standard fuel used by commercial airlines worldwide. It is procured under ASTM D 1655.