What old cluster bomb was the CBU-103 converted from?

The CBU-103 is a cluster bomb that was developed as an upgrade and conversion of the older CBU-87. The CBU-87 itself was designed for use against armored vehicles and other targets, but as military technology advanced, the need for more effective and precise targeting led to the development of the CBU-103.

The CBU-103 incorporates modifications that enhance its deployment capabilities and overall effectiveness, allowing for more accurate targeting and reduced collateral damage. This shift reflects a broader trend in military strategy toward precision-guided munitions, which can minimize unintended harm while maximizing effectiveness against specific targets.

The other options, such as the CBU-89, CBU-105, and CBU-97, represent different types of cluster bombs that serve distinct roles and utilize different technology. Therefore, they are not the correct answer, as they do not directly relate to the conversion that led to the development of the CBU-103 from the CBU-87.