Rehberg was a professor of organic chemistry at Bucknell University until the late 1990s , when she left to enter theological school . For over 20 years , Rehberg volunteered as an EMT and firefighter . She was in New York City on September 11 , 2001 and provided first aid to survivors of the World Trade Center attack . Later , she volunteered with a hazmat team doing cleanup at Ground Zero
World Trade Center attack
September 11 attacks
Gretchen Rehberg