Really Oleo, what airline do you work for where accountants are ringing you up telling you how much fuel to carry? I would be surprised if anyone is being contacted by commercial to explain their fuel orders. Any pressure being applied is self-imposed. There is no need for an OM to spell out a plan b, that is implied in the responsibility of the PIC to carry whatever fuel he/she considers necessary to get the job done safely. The big problem with Adelaide is that the occurence of fog is so rare that if it is not on the forecast then the forecast will be accepted at face value. The problem in this incident is that when the crew of both aircraft were gathering the information on which to decide a course of action they were provided with faulty info regarding the weather at MIA. It simply isn't acceptable that having not forecast the fog in ADL that they provided information to Airservices that MIA would be wide open.