Upgrading in example sentence
Various reports suggest that China is selectively enhancing its strategic and tactical missile capabilities by developing solid-fuel motors; diversifying its range of warheads and increasing their accuracy; deploying missiles with multiple warheads; and upgrading its ballistic-missile defense countermeasures, such as decoys, chaff, jamming, and thermal shielding, and possibly maneuverable reentry vehicles (MaRVs) and multiple independently targetable reentry vehicles (MIRVs).