Iran's PressTV gave an estimate on the size of the security force for today's swearing-in ceremony in Tehran:
More than 5,000 security and police forces gathered around the building of Majlis in central Tehran. Sniffer dogs were securing the area.
In any case, the video seems to indicate that this was the case, or that someone has opened the world's largest used motorcycle dealership. Still, Iranians are trying to gather: