Why is a construction problem that yields this concrete core sample being called a design flaw? Because if it is properly diagnosed as a bad concrete pour and properly resolved by tearing out the faulty concrete and redoing the work, that would cause major new delays and probably bankrupt construction companies in Spain, Italy and Panama and possibly some of their suppliers, insurers and lenders as well. Calling it a design flaw allows for a quicker, cheaper and shorter-lasting fix and for those responsible for the bad concrete to litigate with designers in an attempt to pass off some of the costs of their mistake to others.
Two new sets of cracks in the new PanCanal locks
http://www.thepanamanews.com/2015/11/two-new-sets-of-cracks-in-the-new-pancanal-locks/