Fears grow for Barack Obama's security
- The secret service is reported to have already investigated more than 500 death threats against Mr Obama during the presidential election contest. Last month, two neo-Nazi skinheads were arrested for conspiring to assassinate Mr Obama.He is expected to be protected by a secret service detail with hundreds of close-protection agents. Over the past few weeks, the US government has also begun secretly testing a new ultra-secure presidential limousine able to withstand most bomb blasts and terror attacks. Details of his movements will be a closely guarded secret for all but his most senior aides.