The letter said that leader Kim Jong Il dedicated himself to happiness of the working masses all his life and reliably defended socialism from all threats, blackmails and sanctions of the imperialists.

Kim Jong Il's revolutionary idea and cause are being steadfastly carried forward by Kim Jong Un, it stressed.

The letter strongly demanded the U.S. and the south Korean authorities stop at once the dangerous military exercises which will lead the situation on the Korean peninsula and the north-south relations to catastrophe and unconditionally accept the crucial proposal and open letter of the National Defence Commission of the DPRK.

In the letter the WFTU expressed full sympathy and support for the DPRK's stand that foreign forces should be rejected, the stand of By Our Nation Itself be firmly adhered to and an atmosphere be created for improving the north-south relations if the reunification of Korea is to be achieved.

The WFTU will as ever extend invariable solidarity to the General Federation of Trade Unions of Korea and the whole Korean working class, the letter concluded.