The Red Invader — Frederick C. Davis

A happy crowd, inspired by the spirit of Christmas, was milling joyously in Times Square, New York. Suddenly, cutting through the sounds of gayety, came a shrill whine. It became louder, and at the very second of midnight, a gigantic shell exploded, killing, maiming, destroying! At twelve hour intervals thereafter-no man knew in advance where-another shell burst devastatingly. Two great powers were openly accused in the newspapers. War-savage and bloody-was imminent, and Operator 5 realized that he had encountered his most cunning foe, the clever woman spy-Radi Havara!