Mr. Bob Pietrowsky (IWR-USACE) responds to a question during the panel discussion that concluded the seminar celebrating release of the joint history book. (left to right) Harold van Waveren (RWS Water Safety Adviser), Jaap Kwadijk (Deltares Science Director), James Dalton (Chief, Engineering and Construction HQUSACE) and Bob Pietrowsky (Director, IWR-USACE).