A sign indicating that "Not All Alien Invaders are From Outer Space" depicts some of the plant and wildlife items that can be dangerous if brought into the United States. This poster hangs on the wall in the lab area where Customs and Border Protection agent Jesus Castro works on Wednesday, Feb. 8, 2012. He found a small insect on a piece of fruit and will examine it under the microscope. (Barbara L. Salisbury/The Washington Times)
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