The US Air Force has released the draft Key Performance Parameters for the T-X jet trainer it hopes will eventually replace the Northrop T-38C Talon. From the specifications, the USAF is asking for a pretty robust set of capabilities. One of the requirements is that it should be able to take the place of the F-22 bridge course (Eight rides in a two-seat F-16, doing night aerial refueling and making sure the new guys can pull 9Gs while operating the radar and what not) before new pilots head to the Raptor B-course. Lockheed Martin, BAE Systems, Alenia Aermacchi and Boeing are expected to bid.
Read the write up here, but below are the USAF's list of KPPs and Key System Attributes that it wants.