'Dotard' meets 'rocket man': The bitter past of Trump-Kim relationship

Only until months ago, the two leaders had been calling each other names like 'dotard', 'mad man' and 'rocket man'

With US President Donald Trump meeting North Korean Leader Kim Jong-Un within months of trading insults and threatening each other with nuclear annihilation, the relationship between the two leaders will probably go down in history as one of the most extraordinary ones.

Only until a few months ago, the two leaders had been making insulting remarks against each other and flaunting their respective military might to threaten each other. As the two leaders meet in Singapore to settle down their differences, here's a look at the bitter past of their relationship:

'Mentally deranged dotard' 

The Pyongyang leader, notorious for using