Tactical nuclear weapons are very expensive to design and build, yet will likely have no new strategic value.  Countries have spent many billions of dollars developing tactical nuclear weapons in recent decades in the hope of maintaining their positions as nuclear powers with access to a whole range of terrifying weapons. However, little real applicability exists for most of these weapons. Weapons such as the Robust Nuclear Earth Penetrator (RNEP), being developed in the United States at enormous cost, is designed to burrow deep underground to destroy enemy bunkers, yet it is as yet unusable, since the weapon cannot as yet burrow even a tenth of the distance underground necessary to prevent considerable radioactive fallout in the area surrounding the blast site1. In fact, many scientists say the weapon is a chimera and will never be capable of doing what it is meant to without risking huge collateral damage. Furthermore, it is unlikely that many states would consider the use of nuclear weapons appropriate, regardless of size. This international taboo should be considered a positive step toward peace, and not be tampered with by overzealous governments seeking strategic advantage. Overall, tactical nuclear weapons will likely prove to be little more than expensive dust-gatherer in most cases.  1 Union of Concerned Scientists. 2005. "Robust Nuclear Earth Penetrator".