Did such information enable China to develop more effective missiles?

Some third world countries have developed or bought shorter-range missiles.

In response, both sides increased their efforts to develop long-range missiles.

Iraq was developing ballistic missiles with a longer range than permitted.

So they develop missiles and nukes, then bargain them away.

Now the race is on by the two countries to develop missiles that could deliver nuclear warheads.

"We have been talking to them about our concerns that they not develop missiles beyond that range."

Four of the nations developing missiles already have or are close to acquiring nuclear weapons capabilities, he said.

And they see no nuclear newcomer able to develop long-range missiles "for at least another decade."

Israel and Egypt both have active programs under way to develop longer-range missiles.