Security men at the Kotoka International Airport Wednesday morning brought business at the airport to a brief standstill. Reports say the action of the Aviation Security was to protest some violence visited on some of them by operatives of the National Security.Aviation security men and operatives of national security reportedly clashed Tuesday night when President John Mills returned from the United States.Wednesday morning the airport security locked down the domestic side of the airport protesting what they say is disrespectful and violent conduct of operatives of national security.Joy News’ Fiifi Coomson said the situation has been brought under control.