"An attack on a public location, but particularly one that people use in their everyday lives, has a very strong psychological impact and it also tends to generate a lot of media coverage."

VOA: standard.2010.04.01

You can see that residential investment, as a fraction of GDP, has been very variable through history of the United States since World War II and that it's had a strong relationship with recessions.

住宅投资要计入,国内生产总值,纵观美国自二战以来,这部分投资,变动很大,而且与衰退存在着密切关联

耶鲁公开课 - 金融市场课程节选

North Korea,as it has in the past, has reacted to the joint exercise with strong threats -- saying they may lead to a "sacred war" in which Pyongyang would be compelled to use its nuclear weapons.

VOA: standard.2010.07.26