NEW : President Obama calls the denigration of Vietnam veterans a ` ` national shame '' ` ` America will be there for you , '' Obama tells veterans and their families . Memorial Day launches a 13-year commemoration of the Vietnam War 's 50th anniversary . At the National World War II Memorial , retired Army Lt. Gen. Mick Kicklighter paid tribute to the fallen from that conflict . ` Obama lays a memorial to the fallen at Arlington National Cemetery .
NEW : President Obama calls the denigration of Vietnam veterans a ` ` national shame '' ` ` America will be there for you , '' Obama tells veterans and their families . Memorial Day launches a 13-year commemoration of the Vietnam War 's 50th anniversary . Obama lays a memorial to the fallen at Arlington National Cemetery .