Section of year-old concrete concourse at Paris airport dropped, killing at least four people Construction problems with supports of the vaulted concrete concourse that partially collapsed early on May 23 at the year-old Terminal 2E at Paris Charles de Gaulle Airport will likely be a focus of investigations into the cause of the failure, which killed at least four people. Roughly 30 meters of the unusual freestanding vault enclosing the 650-m- long elevated concourse dropped several meters off its bearings with little warning. On evidence available at press time, an independent structural specialist suggested faulty concrete bents. "It looks like...