AMERICAN architects are furious with Dr Jonas Salk, the discoverer of the polio vaccine. Dr Salk commissioned Louis I Khan to design his institute in La Jolla, California. The building was acclaimed as a masterpiece. Now there are plans to uproot 67 eucalyptus trees and build a 113,000-square-foot annexe. The protestors say it is like tampering with the Acropolis. Dr Salk pooh-poohs the complaints and says Mr Khan, who died in 1974, would have been delighted.