Setting just the data source at run-time will be problematic because the data set is bound to a single data source and your controls on the report are then bound to a specific data set. This hierarchy would be pretty sticky to try and build yourself each time the report runs.
You can create a Report Parameter for the database connection string.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.