Commerce Department trade officer Catherine Werner used to promote American business from the U.S. consulate in Guangzhou, China. Today she says she suffers from bouts of nausea, dizziness, and headaches. Robyn Garfield, also a trade officer with the Commerce Department, was posted in Shanghai. Along with nausea, dizziness, and headaches, he says he has trouble remembering words. State Department security officer Mark Lenzi used to work in the consulate in Guangzhou. When he did, he said the splitting pain in his head was debilitating. The three are among at least 15 American officials in China who say they suffered unexplained brain trauma after being attacked by a mysterious weapon. Previously, 25 Americans who worked in the U.S. embassy in Cuba said they also experienced an attack and have similar symptoms. The government employees weren't the only ones targeted. Their spouses, children, and family pets also exhibited neurological symptoms after hearing strange sounds in their homes. In July, a University of Pennsylvania medical team published a study on the brains of U.S. government personnel who developed neurological symptoms in Cuba. The study used advanced brain imaging and found "significant differences in brain tissue and connectivity" in the diplomats' brains. It is the first scientific evidence showing the diplomats had physical damage to the structure of their brains.