US
Direct exchanges of fire across the inter-Korean land border are extremely rare
South Korea's news agency says Choe was executed by firing squad in May after voicing opposition to Kim's policies
The isolated country recently announced more than 100 separate projects seeking foreign investment
The change will put the standard time in North Korea at GMT+8:30, 30 minutes behind South Korea
In past, the accolade was handed to such freedom icons as Mahatma Gandhi and Aung San Suu Kyi