Yugoslav-born artist Marina Abramovic is among the most original performance artists today. Her work includes such classics as her 1974 piece Risen 0, performed in Milan, in which she invited the audience to deal with her using such objects as razor blades and a loaded gun. But this week she's doing something else—from today through next Tuesday, she is re-creating other artist's classic performance-art pieces from the 1970s in the rotunda of the Guggenheim Museum.