This is a very big weekend at the Valley Preferred Cycling Center.
The U.S. Junior National Championships have returned to the Velodrome.
National champions are being crowned for teenage riders.
On Friday night, Schnecksville's James Mellen won a national title in the Men's 17-18 sprint final.
The event kicked off on Thursday and will run through Sunday.
WFMZ's Jim Vaughn has highlights from day two of the Junior Nationals.
Allentown, PA 18102