To amend title 38, United States Code, to establish a presumption that certain veterans were exposed to radiation and other toxins at the Nevada Test and Training Range for purposes of the treatment of certain disabilities under the laws administered by the Secretary of Veterans Affairs, and for other purposes.

This bill creates a new presumption that veterans who served at the Nevada Test and Training Range since January 1, 1972, were exposed to radiation and toxins during their service. It directly affects veterans assigned to duty at this Nevada site, including airspace above it, by establishing that such exposure is assumed without requiring individual proof. Key provisions include adding onsite military work at the Nevada site to the list of "radiation-risk activities" and specifically covering lipomas and tumor-related conditions as service-connected disabilities for these veterans. The change simplifies the process for qualifying veterans to receive VA disability benefits related to these health conditions.