Similar title :
New York: UN chief celebrates the 20th anniversary of the September 11th attacks #Gallery
Pepperdine University is celebrating the 20th anniversary of September 11th
Pepperdine flag display commemorating September 11th
Pepperdine University Hosts Annual Waves of Flags Exhibition in Honor of in 9/11 fallen lives

Ref: https://losangeles.cbslocal.com