Just because. ;)
Now that the Superhuman Registration Act is in force, the registered heroes have to get on with the job of recruiting and training the new wannabe heroes who have signed up. That takes place at Camp Hammond, the Initiative's HQ, insensitively located at Stamford. In theory, the new heroes get trained up and then assigned to the fifty state teams, thus ensuring that Vermont is forever safe from nastiness.
You won't stop me so easily, Tony Stark!
*dives into his mountain lair*