The main purpose of this legislation, known as the "No 9/11 Family Left Behind Act of 2026," is to provide additional financial support to certain individuals who have been affected by acts of terrorism sponsored by foreign states. Specifically, it aims to amend existing laws to allow for lump sum payments to eligible claimants who have not previously received compensation. Key provisions of the legislation include a requirement for the Special Master, an appointed official responsible for overseeing claims, to notify eligible claimants within 90 days of the law's enactment.