Today, Iowa Public Radio continues its week-long series “Being Physically Disabled in Iowa.” Over the past 20 years, access to public buildings for people in wheelchairs has vastly improved. The 1992 Americans with Disabilities Act gets much of the credit. This federal law requires facilities to take reasonable, achievable steps to remove barriers for people with disabilities. Reporter Rob Dillard spent a recent afternoon with a wheelchair-bound woman, checking out various public buildings in Des Moines. They found a few roadblocks still in place.