Probably countries that threaten their neighbours, or have shown acts of aggressiveness in the past, like Iraq and North Korea.
Remarkable in your link is that Ethiopia is one of the suspected holders of weapons of mass destruction. Now there's a country that has a shortage of just about anything, food, water, medical supplies, clothing, you name it.... but hey.... at least they have weapons of mass destruction.
Now why in gods name would a broke ass country like Ethiopia need WoMD's ? What exactly was the government thinking when they purchased them ?