By Luc Olinga The Swiss bank is under pressure after numerous scandals have cost it several billion dollars. Reassuring internally and externally. This is the mission that Ulrich Körner set for himself at a time when Credit Suisse, founded in 1856, is going through one of the most difficult and painful periods in its history. Körner, who took over as CEO last August, wants to give the impression that all is well, that the boat is sailing smoothly, despite the fact that the waters are threatening. But sometimes this exercise turns into a tough balancing act. In his last memo sent to employees o…