- Title: Lean on US
- Artist: Bill Cooper
- Location: Water St. between Eagle St. and Webster St. on the Riverwalk
- Medium: Sculpture
- Installation Date: 2003
- Description: September 11 memorial monument.
- Plaque Text: This memorial is dedicated to the more than 3,000 people who died in the September 11, 2001 attacks on America. Two hijacked airliners brought down the World Trade Center twin towers in New York City. A third hit The Pentagon. The fourth, whose target is unknown, crashed in a Pennsylvania field after passengers rose up against the terrorists. The memorial sculpture contains a beam from the wreckage of the World Trade Center, fragments from the facade of the Pentagon, and granite from Pennslyvania symbolizing the freedom fighters of Flight 93. Incised into the surface of the granite are the insignias of the brave New York City rescue workers and a print of the boot of Commander Dan Shanower, a Naperville native who died in the Pentagon attack.