What does secondary fragmentation include?

Secondary fragmentation refers to the fragments and debris generated as a result of an explosive event, encompassing various materials that can affect the vicinity. The correct choice indicates that secondary fragmentation may include both primary fragmentation, which comes from the explosive device itself, and debris from nearby areas.

When an explosive device detonates, it often disperses pieces of its own casing (primary fragmentation) and can also project other materials found in the immediate environment. This debris can range from metal fragments, soil, glass, or any nearby object that might be propelled by the force of the explosion. Understanding this concept is crucial for evaluating the potential impact zone and assessing safety measures post-explosion.

In contrast, the other choices limit the scope of what secondary fragmentation entails. Some refer only to the munitions casing or materials far removed from the explosion, overlooking the critical role of surrounding debris and primary fragments. Others mistakenly focus on materials that are non-explosive, failing to recognize that explosive detonations create a dynamic environment where various pieces can contribute to secondary fragmentation.