Decades later, people are still dying from the 9/11 terrorist attacks. Why?

On September 11, 2001, nearly 3,000 people died, many of whom were first responders. Today, World Trade Center first responders who are still alive are being diagnosed with illnesses like lung disease and cancer more often than the general population. Many scientists say the air pollution caused by the terrorist attack is to blame. Links to the Tiny Show & Tell stories here and here. Episode transcripts at acs.org/tinymatters