Logo / Web Site Header / Banner

We are developing an application for international aviation administrations (several countries) and we are having a hard time coming up with an application/website header graphic. The application will be titled ASSET (Aeronautical Surface Screening Evaluation Tool) and the header/logo will need it accommodate a theme consisting of international (perhaps flags) with commercial aviation (airplanes, etc) and ground obstructions (antennas, wind turbines, etc). You don’t need to use all three, or any of those all ... we are at a loss for ideas and need a professional to put imagery together to make our application really stand out. We will be demonstrating this application in Ireland to several different countries in late March (3 weeks) and we really need to look professional. The application header will be about 60-90px tall and should focus most of the heavier imagery to the left hand side. If we like, we will have many more requests like this in the future. Thanks for your bids!!