Answer:
that's are the tree reason of vietnam memorial controversial
Inscribed in the memorial are the names of service members classified as "declared dead"; as the memorial contains names of individuals who had died due to circumstances other than killed in action, including murder, vehicle accidents, drowning, heart attack, animal attack, snake bites and others. Also included are the names of those whose status is unknown, which typically means "missing in action" (MIA). The names are inscribed in Optima typeface, designed by Hermann Zapf. Information about the rank, unit, and decorations are not given.