A German cruise ship planned to evacuate passengers in Yemen and fly them today to the next port of call to avoid possible encounters with pirates off the coast of lawless Somalia. Several other cruise operators said they also would shift or cancel tours that would have taken clients past Somalia, as nations and companies around the world debate how to confront the piracy. The European Union said its anti-piracy mission would station armed guards on vulnerable cargo ships, the first deployment of military personnel during international anti-piracy operations. That deployment will not cover cruise ships. After the German ship drops off the 246 passengers in Yemen, they will fly to Dubai and spend three days at a five-star hotel before rejoining the ship in Oman.