Krohn shares the story of 9/11 with her students each year. She also works with the Freedom Flag Foundation. The Freedom Flag, which began as a sketch on a napkin by a Virginian, honors those affected by the attacks.
The foundation encourages displaying the Freedom Flag on 9/11, discussing its meaning, and holding a moment of silence.
In 2018, Virginia passed a law making the flag an official symbol there. Several other states are considering doing the same.
To help spread the word, the foundation sends a free kit to selected U.S. schools each year. It contains a Freedom Flag, a piece of steel from the World Trade Center, and a book written by Krohn.
“Our goal is to make the Freedom Flag a national symbol of remembrance for 9/11,” she says, “so that future generations never forget.”