UN member states are involved in Libya at the specific request of the Security Council - The Resolution is UNSCR 1973 and that is fact not fiction.

So   "...what was happening in Libya in February and March this year would have been strictly internal too had Gaddafi not resorted to hiring in Mercenaries to kill Libyan citizens.

"Ingenious, but sheer tosh." Eh??

Care to point out anywhere in the quoted passage where I am in error. Gaddafi, or his sons most certainly gave the orders but large numbers of his officers and troops refused to obey them, so Gaddafi had to bring in mercenaries recruited from Niger, Mali, Algeria, Ghana and Burkina Faso.

Care to tell me where Assad in Syria is using mercenaries? Are Iran supplying the Syrian military with troops from their Revolutionary Guards?

"Could it not be that if a WMD programme is openly declared, countries who already have nuclear weapons try to interfere?" - PeterK

As the countries involved are signatories of the Nuclear NPT they have to follow the terms of the treaty should they wish to leave and develop nuclear weapons. It is all very well laid out and explained in the treaty document. By following to the letter the procedure for this then cuts the country off from receipt of technical aid or assistance from all other signatories, this did not suit Iran, Libya, Syria or North Korea.

Israel is not a signatory member of the Nuclear NPT her nuclear industry roughly dates the same as that of the UK and France and predates the NPT by about 13 years.