The truth behind the Heineken Jammin' Festival?

The first analyses to assign responsibility for the collapse of the stage during the Heineken Jammin' Festival in S. Giuliano Park this past 16 June have been released. Wind tunnel tests that simulated the atmospheric conditions of that day revealed that there wasn't any unusual atmospheric event that contributed to the collapse of the stage's towers (confirmed by meteorological readings taken that day at nearby Marco Polo Airport). Besides, some parts of the structure, which were higher than those that collapsed, remained intact, thus contributing to the hypothesis that the whole structure was improperly constructed.