Did the ground floor bring down the building? My reading of the Eastleigh collapse video is that it did. The failure appears to begin at the ground-floor level, where the columns look relatively small and the floor is open, without the masonry walls that stiffen the upper levels. The upper building then comes down rapidly, almost as one mass. That is the signature of a possible soft-storey failure. A soft storey is a level that is substantially less stiff against sideways movement than the floors above or below it. In many buildings, masonry walls above help restrain movement. At ground floor, shops, parking or access spaces leave the frame open, so the columns alone must provide the required strength and stiffness. This is especially dangerous in high-rise buildings. During an earthquake, sideways movement concentrates at the open level while its columns are already carrying the accumulated weight of every floor above. If those columns cannot carry both the vertical loads and the lateral deformation, that one floor can fail and bring down the whole building. But there was no earthquake in Eastleigh. That makes the central question more serious: what caused the ground-floor supports to lose capacity? Were the columns underdesigned? Were they too slender? Was the reinforcement less than specified, smaller than specified, or of poor quality? Was the concrete below strength? Were construction loads, workmanship, or malice involved? The collapse looks disturbingly like a controlled demolition. The building comes down in a rapid, near-vertical and remarkably uniform manner. That resemblance will naturally make people ask: were explosives used? The video alone cannot answer that question. A rapid progressive collapse after the loss of several ground-floor columns can look much like a controlled demolition. The dust bursts from the base may simply be compressed air, pulverised masonry and debris escaping as floors collapse; they are not proof of explosives. But the possibility should be formally ruled out, not dismissed by social-media arguments. Investigators should preserve the site, inspect the surviving columns and debris for blast damage, test for residue where appropriate, examine available CCTV and phone footage, and reconstruct the failure of the ground-floor supports. If it was a structural failure, the evidence will show it. If foul play was involved, that too must be established by evidence. Of course, material quality cannot be treated as a side issue. Recently, I tested reinforcing bars from one of Uganda’s leading steel manufacturers. The bars split in a manner I had never seen before. I rejected them. Company representatives came to my site and threatened me. I insisted that steel from their factory would not be accepted until they explained the failure. They later told me the bars had come from a batch of poor-quality billets supplied to them, but that the billets had already been used up. I asked whether they would recall the bars made from that batch. I was told they could not. The bad billets may have been finished at the factory, but the bars were already in the market and inside projects. That experience does not prove what happened in Eastleigh. It shows why quality control is a cost only pennywise and pound-foolish builders avoid. The designer designs for a specified grade of steel and concrete. The standards bodies must protect the public by ensuring that what is sold in the market is tested, traceable and up to standard. Independent testing, batch tracking, factory surveillance and enforceable recalls are not luxuries. A building does not stand on an approved drawing. It stands on the actual bars, concrete and workmanship hidden inside its columns.