Rumsfeld also warned Iran -- a longtime enemy of Iraq -- about proxy forces moving into Iraq, where the United States and coalition forces are waging a war to topple the regime of Iraqi leader Saddam Hussein.

CNN: Rumsfeld warns Syria about aiding Iraq

Nearly everyone now recognizes the hazards of military invasion, even to topple a ghastly regime, so let's stipulate that we are thinking here about other measures.

FORBES: Causes and Effects

While this certainly makes sense, in truth, the US doesn't need to build up much of a capacity to topple either the regime in Pyongyang or the regime in Teheran.

CENTERFORSECURITYPOLICY: Numbering the days of dictators