"Racing to meet an October deadline, [the administration has] awarded a contract worth as much as $1.2 billion to a British company ... [Serco] has extensive experience as a government contractor with the Defense Department and intelligence agencies, and it also manages air traffic control towers in 11 states and reviews visa applications for the State Department. But it has little experience with [HHS] or the insurance marketplaces ... Serco will help the Obama administration and states determine who is eligible for insurance subsidies, in the form of tax credits, and who might qualify for Medicaid. Tasks include 'intake, routing, review and troubleshooting of applications,' according to the contract."