North Korea pledged to pursue its nuclear program and warned any future president of the U.S. that its enhanced nuclear power will be their biggest security concern, the Tokyo-based pro-North media outlet Chosun Sinbo reported on Saturday.

The outlet reiterated that any kind of sanctions and blockades in the wake of the DPRK’s fifth nuclear test wouldn’t affect the country’s will to beef up its nuclear capabilities.

The North has reached the stage where it can retaliate against its enemies with the capability of mounting “miniaturized warheads” on various kinds of “ballistic missiles” since it first conducted its October 2006