On ADSB i can see Blue 61 + Blue 71, both KC10's crossing the Med from east to west. However those were rumoured to drag AV8B's to Lajes instead of F16's to Moron.
So if you saw F16's the rumour about AV8's could be wrong.
Pieter,
Visitors
CE.16-11 14-40 EF2000(T) Ala14 (arrived and parked under sun shelters with based aircraft)
(TR.12D-76) 72-21 CASA212 721Esc
T.19B-22 09-502 CN235M Guardia Civil
MV-22B's VMM-774
(168626)/MQ07, (168618)/MQ08, (168349)/MQ09, (168347)/MQ15, + in hangar (168611)/12,
didn't see 168630/MQ14, but was probably in closed side of the hangar.
KC-135R
38000 & 38025, no unit marks.
NB-There are now 3 lines of sun shelters here (only 2 on my visit a year ago)