Some ex-presidents just can’t keep their mouths shut.

Former President Bill Clinton on Friday cast doubt on the effectiveness of a planned U.S. missile shield, deriding it as a “colossal waste of money”.

Clinton said the defense system, parts of which are to be deployed in Poland and the Czech Republic, had created unnecessary difficulties with Russia, which denounces the plan as an attempt to undermine its defense capabilities.

“My facts may be wrong, but my impression is that we are creating a crisis here when none is necessary,” Clinton told a conference in the Ukrainian resort of Yalta on the ex-Soviet state’s relationship with Europe.

“Because I don’t think the missile defense system is reliable enough to create an impact.”

Maybe he’s right. But there’s an advantage to having your enemies, say Kim Il Jong, think that any missile strike will fail and will result in massive counterattack.

Thanks a lot, Bill. You’ve done so much to protect America and innocent life.