[By NBC-1TV E. H Kim]With 30 days left the 2012 Seoul Nuclear Security Summit Secretariat is placing its best effort on the preparations for a successful summit. Promoting the Nuclear Security Summit's main purpose of keeping the world safe and peaceful, free from nuclear terrorism is a ongoing activity.

The Seoul Nuclear Security Summit is expected to have 58 summit-level participants, consisting of 53 state leaders and four international organization heads, making this the largest summit in the history of Korea.

Paticipants will include the 47 countries and three international organizations (UN, IAEA, EU) of the first Washington Summit and newly added Denmark, Lithuania, Azerbaijan, Hungary, Romania, Gabon and Interpol, while President José Manuel Durão Barroso will represent the EU.