Surviving spouses of Veterans who died on or after Jan.1, 2000, do not lose eligibility for burial in a national cemetery if they remarry. Burial of dependent children is limited to unmarried children under 21 years of age, or under 23 years of age if a full-time student at an approved educational institution. Unmarried adult children who become physically or mentally disabled and incapable of self-support before age 21,or age 23 if a full-time student, also are eligible for burial.