CNN 3月3日听力材料
地名：Frankfurt Airport
First up, President Obama says the U.S. will spare no effort to learn how an outrageous attack took place. Happened yesterday at Germany's Frankfurt Airport. Two American troops were shot and killed on a U.S. military bus. Two others were wounded. They were security forces who were being deployed. German police have one suspect in custody. Officials say that what they think happened is that the gunman rushed onto the bus while it was waiting outside the terminal and then started shooting. This would be a federal crime in both the United States and in Germany. This story was developing when we produced this show yesterday. For the latest: .