The area was under a dense fog advisory at the time of the pileup, said Laura Belanger, a meteorologist at the National Weather Service in Peachtree City.

NPR: Authorities: 4 Dead In Fiery Highway Crash In Ga.

It's about to launch a series of Youth Advisory Boards which will oversee the commissioning of services in an area and share best practice.

BBC: Can the Big Society cope running youth services?

"There is the potential for disruption to traffic in the area of Kairouan and possible confrontations with security forces, " an advisory said.

BBC: Tunisia bars Ansar al-Sharia Salafist meeting in Kairouan