How Hidden is the Rape of Nanking Today?

Throughout her interview, Mrs. Chang made repeated statements that the Rape of Nanking was not widely known in the rest of the world, including America. This interview was made in 1997, and that leads me to question how true her statements are today. I certainly recall being taught about the Rape of Nanking in World War last year; I am pretty certain that it is mentioned in the History 10 textbook. Has much really changed in regards to the Rape that 1997 would be much different from today? How true are Mrs. Chang's claims?