pearljam145 writes that the "UK is planning to test biometric passports that will include face and iris or fingerprint recording and recognition for a 6 month period on 10000 volunteers. Read here for more details. A face recognition chip is going to be the primary biometric and iris or fingerprint scanning will be use as a secondary biometric. However face recognition might not be the perfectly viable solution since it has produced too many false positives in the past. Face recogntion to this date is not robust enough to support real time recognition in a crowd (more failures?). Only with cooperation of the subject does this system produce good results. So will face recognition join fingerprint and iris recognition in a long list of obtrusive recognition techniques?"