 Immigration control at airports gradually changed from the late 1990s onward as a new emphasis was given to controlling passengers in visa issuing posts abroad.During the 2000s new technologies opened up opportunities to create a new "flexible" border control that better focussed its resources on high risk passengers.There were little or no IS resources dedicated to dealing with in-country immigration offenders before 1973 and the detection of potential deportees was seen as a matter for the police.