EXPLAINER: How health care for vets became fight in Congress

Veterans, military family members and advocates call for Senate Republicans to change their votes on a bill designed to help millions of veterans exposed to toxic substances during their military service, at the Capitol in Washington, Monday, Aug. 1, 2021. A bill that enhances health care and disability benefits for millions of veterans exposed to toxic burn pits has hit a snag in the Senate. (AP Photo/J. Scott Applewhite)