The Obama administration has announced it will let thousands of Hurricane Katrina victims remain in trailers they had been told to leave by the end of last month. The White House says the Gulf Coast residents will be allowed to purchase their trailers for nominal fees of $5 or less. And it says it will give the more than 3,400 families living in trailers priority for $50 million in housing vouchers. The eviction plans had come under wide criticism, because almost none of the housing destroyed by Katrina has been rebuilt or replaced.