Two of the three scientists sharing the 1997 Nobel Prize for Physics -- William D. Phillips, of the U.S. National Institute of Standards and Technology in Gaithersburg, Maryland, and Claude Cohen-Tannoudji, of College de France and Ecole Normale Superieure in Paris -- have visited the ICTP on several occasions. Cohen-Tannoudji attended Centre workshops in the early 1970s and Phillips was last here in 1992 for the ICTP's winter college in optics. Together with Professor Steven Chu, of Stanford University in California, Phillips and Cohen-Tannoudji received the Nobel Prize for the development of methods to trap and cool atoms with laser light.