The Transportation Security Administration announced that it is considering a variety of options to attract more travelers to its PreCheck program, after falling short of the agency’s projections. The PreCheck program charges enrollees $85 for five years and expedites the screening process, allowing vetted travelers to keep on their shoes, coats and belts; and leave laptops and eligible liquids in their bags. According to an announcement, options include memberships that don’t last five years; a subscription model that allows enrollees to pay the fee in yearly installments; and on-site PreCheck enrollments at select airports. The TSA has projected 5 million new enrollments a year but there are only 8.54 million members against earlier expectations as high as 25 million. TSA PreCheck is available at more than 200 airports in the US, and the vast majority of members, according to the agency, get through security in five minutes or less.