As President Donald Trump directs cuts of tens of thousands of federal government employees, among those laid off at America's health agencies are workers at a National Institutes of Health department focused on dementia research, including its incoming leader, three people familiar with the terminations told ABC News. The firings at the Center for Alzheimer's and Related Dementias (CARD) affected roughly a tenth of the nearly 100 employees at the center, but in interviews with ABC News, workers there described a carefully woven web of collaboration that they say could be threatened by the layoffs of just a handful of...