The role of Bertotti-Robinson geometry in the attractor mechanism of extremal
black holes is described for the case of N = 2 supersymmetry. Its implication
for a model-independent derivation of the Bekenstein-Hawking entropy formula is
discussed.Comment: 13 pages, figures, uses procsla,epsf,epsfig; Talk given at the 12th
Italian Conference on General Relativity and Gravitational Physics, Rome,
September 199
