First responders who were at the World Trade Center on September 11th, 2001 are at risk of developing dementia, two new studies show.

"...a significant portion of responders have new onset cognitive impairment when many of them were cognitively normal within just the past few years."

"It's not just 'Did this happen to you?' But 'Did something almost happen to you?'"

Blood samples from 9/11 responders with PTSD symptoms suggest a potential link to dementia.

The first report of head and neck cancers in WTC first responders is alarming: a 40 percent increase in diagnosis of these diseases between 2009 and 2012.