Kim's leadership has followed the same cult of personality as his grandfather and father. In 2014, a UNHRC report suggested that Kim could be put on trial for crimes against humanity. He has ordered the purge or execution of several North Korean officials; he is also widely believed to have ordered the 2017 assassination of his half-brother, Kim Jong-nam, in Malaysia. He has presided over an expansion of the consumer economy, construction projects and tourist attractions. Kim also expanded North Korea's nuclear program which led to heightened tensions with the United States and South Korea. In 2018 and 2019, Kim took part in summits with South Korean President Moon Jae-in and US President Donald Trump. He has claimed success in combatting the COVID-19 pandemic in North Korea, although many experts doubt the country has had no cases altogether.