Passersby rushed to lift the multi-screen video display off the family, and it's estimated weight of 300-400 pounds required six people to lift it up. ABC News coverage can be found here:
Witnesses described the display to be a free-standing assembly that was not anchored to the wall behind it. It appeared that the structural integrity of the floor, although concrete, may not have been sufficient to support the weight of the front-heavy unit. Investigators are working to determine if the framework failed, or the floor failed. The accident occurred only weeks after the airport had completed a $201 million dollar remodeling.
Update 2013-03-31: Luke Bresette, 10, was killed by the falling sign, while his 5-year-old brother Tyler suffered a concussion, and his 8-year-old brother Sam had a broken leg and nose. The boys’ mother, Heather Bresette, had broken ankles, a crushed pelvis and was in intensive care in the University of Alabama-Birmingham Hospital after surgery.
The father, Ryan Bresette, and another son and daughter, were at the airport but not injured.
Birmingham, Ala.-based Brasfield & Gorrie and Bloc Global Services Group are the construction management team for the $201.6 million modernization project, which began in June 2012
More information about video display mounting can be found here: