Our good friend in the Northeast and MT contributor US Kevin Burke has uncovered and confirmed a new USAF Thunderbird Flight Demonstration Team VHF frequency - 141.175 MHz.
Here are some other VHF Air frequencies that you should have programmed in that scanner of you are a milair monitor:
138.4375 138.550 138.600 138.625 138.750 138.950 139.000 139.300* 139.600 139.700** 139.900 140.200 140.500 141.175 142.300* 142.600 142.700 142.800 142.900 143.000 143.600 143.725 143.750 MHz
* indicates a PTD freq
** indicated a Air Def freq