Jakarta's busy international airport introduced an iris scanner system aimed at business travellers willing to pay around $US200 ($A255) per year to avoid long immigration lines.Under the ''Saphire'' program, frequent flyers register with the immigration authorities, pay the annual fee, and submit to scans of their left and right eyes, which authorities say are as individual as prints of the fingers or palm. On arrival, users scan one eye and are cleared for entry, a process expected to take about 10 seconds.The Indonesian-Dutch venture behind the project says the main thrust of the program was one of convenience, although they hoped that speeding through registered users would allow the authorities more time to scrutinise other travellers for possible security threats. Australian and US authorities sounded warnings this week of possible attacks on Western targets in Indonesia over the Christmas and New Year period.The country has been relatively calm lately, with n...