An FAA website posted this great picture of a portable ATC tower being loaded onto an Antonov An-124 at Homestead Air Reserve Base, to be shipped to Haiti. The second shot is from the USAF.
The tower will assist aircraft operations at Port-au-Prince International Airport. It is 44 feet long, 13 feet high and eight feet wide, and weighs about 25,000 pounds. It comes with two diesel-powered generators and supporting fuel tanks, plus tools and other support equipment for installation and maintenance.
FAA technicians will install and prepare it for service, a process that was expected to take about two days after its arrival. Aside from ATC personnel, FAA has sent an airports division team to inspect and evaluate the physical condition of the runway.