Federal Circuit; surviving spouse; Haynes v. McDonald, 785 F.3d 614 (Fed. Cir. 2015); Brown v. Wilkie, 814 F. App’x 565 (Fed. Cir. 2020); surviving spouse must be married to the veteran at the time of his death to obtain benefits; 38 U.S.C. § 101(3); 38 C.F.R. § 3.50(b)(1); - Veterans VA Disability Claim Community