One of the Italian AMX serials at Lajes must have been mis-read as MM7174 / 51-60 arrived at Nellis as part of the detachment but wasn't listed as part of the 10 aircraft on 'GPs' report.
I visited St Dizier last night (Friday) about 9pm and there was nothing visible other than the preserved Jaguar so I suspect that the Mirages have been hangared for the weekend!