Of America and sacrifice: Is the country ready to step up?

FILE - In this Feb. 14, 1943 file photo Mrs. Caven holds her new point ration book as the grocer indicates the proper stamps to cover purchases in New York. Each person had 48 points for use during March. Not since World War II, when people carried Ration Books with stamps that allowed them to purchase meat, sugar, butter, cooking oil and gasoline, has the entire nation been asked to truly sacrifice for a greater good. (AP Photo/Carl Nesensohn, File)

FILE - This Sept. 17, 1943, file image shows the war ration book four, issued by the office of price administration. Not since World War II when people carried Ration Books with stamps that allowed them to purchase meat, sugar, butter, cooking oil and gasoline has the entire nation been asked to truly sacrifice for a greater good. (AP Photo, File)

FILE - In this Feb. 23, 1943, file photo New Yorkers stand on long lines outside of schools all over the city to get their War Ration Book No. 2, during World War II. Not since World War II when people carried Ration Books with stamps that allowed them to purchase meat, sugar, butter, cooking oil and gasoline has the entire nation been asked to truly sacrifice for a greater good. (AP Photo, File)

FILE - In this June 26, 1942, file photo, women workers at the St. Louis Ordnance plant inspect 50 calibre shell casings. This is the first inspection of the shells after they come through the metal shaping machines. Not since World War II when factories converted from making automobiles to making tanks, Jeeps and torpedos has the entire nation been asked to truly sacrifice for a greater good. (AP Photo, File)

FILE - In this April 3, 1944, file photo Bofors guns used by the Army and Navy are shown lined up at the Firestone Tire & Rubber Co. in Akron, Ohio. Not since World War II when factories converted from making automobiles to making tanks, Jeeps and torpedos has the entire nation been asked to truly sacrifice for a greater good. (AP Photo, File)

WASHINGTON — For most Americans alive today, the idea of shared national sacrifice is a collective abstraction, a memory handed down from a grandparent or passed on through a book or movie.