It often isn’t the explosion itself that harms glass, but the pressure wave that follows. This pressure wave causes glass windows to shatter often just from the sheer force and sometimes from the debris that it carries with it through the air. Regular glass shatters into dangerous shards called spall which can then be carried through the air at high speeds. That flying glass can easily injure people and damage assets. A large portion of injuries from blast-related incidents is caused by glass fragmentation, glass breakage, and spall, which is why the main focus of blast mitigation is impact protection, which reduces the risks of injuries from flying projectiles.