Farish Noor, a professor at Singapore's Nanyang Technological University, argues that in many instances, these conflicts are caused by old customs butting up against arbitrary modern national boundaries.
Former US President George Bush was among those who attended the private remembrance service, as did Prince Philip, Prince Charles and the US ambassador to Britain, William Farish.
"Users have to be better educated about the risks of opening Office-style documents with macros in them without virus-scanning on their desktop, " says Neil Farish, a consultant with The Devon Group in Ottawa.