Man missing after concert in Germany

SCOTTSDALE, AZ Devon Hollahan was last seen at around 3 a.m. Nov. 21 after a concert in Frankfurt, Germany. He was traveling back to a hostel with a friend, who stopped to ask for directions. When the friend turned back around, Hollahan was gone.

Hollahan's father, Jeff Hollahan, told NBC's "Today" show on Friday that hearing that his son had gone missing is "every parent's worst nightmare."

Jeff Hollahan plans to travel Sunday from his home in Scottsdale, Ariz., to Germany to help search for his son.

Devon Hollahan had been teaching English in Prague since July.