Cancellations are coming in from European musicians and ensembles wary of performing in America in the midst of a globally unpopular invasion of Iraq. Last week, Roberto Alagna and Angela Gheorghiu cancelled an appearance at the Met Opera, and this week, the Rotterdam Philharmonic called off a major U.S. tour, which would have included a stop at Carnegie Hall. Some of the performers have cited security concerns – others have merely said that they don’t wish to be in America while the war is going on.