Mythology tells how Achilles, the Greek hero, was held by the heel in the river Styx by his mother, the sea nymph Thetis, in order to make him invulnerable.
As the debate on ratification of SALT II enters its final stage in the United States Senate, there is an upsurge of suspicion on both sides of the great-power divide that one party may be trying to outmaneuver or gain unfair advantage over the other.
