Iowa State Center officials say extra security measures will be added to tonight's Bob Dylan concert at Stephens Auditorium. Staff will do bag checks and metal detecting wand searches of all concert-goers. Those who refuse will not be allowed in. Doors will open at 6:00 for the 7:30 show in anticipation of long lines. The center says additional rules are also in place to combat ticket reselling. Ticket holders in the orchestra pit and rows one through 10 must present identification and the credit card used to purchase tickets to pick up their tickets at will call beginning at 6:00 at a ticket trailer located in the courtyard at the north entrance.