Nils Andersen is ranked one of the most powerful in his business. At the helm of AP Moller Maersk, he is credited for turning around the Danish container shipping titan, the largest player in the world. In an exclusive in-depth TV interview, he gives CNBC's Christine Tan his outlook for the industry, investment plans for oil and drilling, and what it takes to run the massive conglomerate with over 100,000 employees. (April 29)