The recall includes all models of the Specialized 2012 Tarmac SL4, 2013 Tarmac SL4, 2013 Crux and 2013 Secteur Disc. The steerer tube in the front fork can break, posing a fall hazard. Follow link below to CPSC site. 20 images of models at link below.
http://www.cpsc.gov/en/Recalls/2013/Specialized-Bicycle-Components-Recalls-Bicycles-Due-to-Fall-Hazard/