How much notice do you have to give? <a href=" http://www.prisonersonthemove.eu/research-paper-on-stem-cell-research#spur ">thesis proposal cover page</a> Without coverage, Mackenzie's family cannot afford to replace the wheelchair she has been using for the past six years. Nor can they afford $850 a month for physical therapy or the cost of replacing the brace she just got for her club foot. It doesn't fit properly, but "my ankle collapses when I walk without it," Mackenzie offers politely in an interview at the public library in the Gulf town of Pascagoula, a leading producer of ships for the U.S. Navy.