North Korea 's rocket launch failure increases chance of nuclear test , analyst said . Comment: Launch was meant to mark 100 years since the birth of Kim Il-sung . Lewis said he believes Friday 's rocket launch was the main motivation behind Pyongyang 's recent willingness to engage with U.S. negotiators . A nuclear test would also fit North Korea 's pattern of serial provocations , analysts said .
North Korea 's rocket launch failure increases chance of nuclear test , analyst said . Comment: Launch was meant to mark 100 years since the birth of Kim Il-sung . A nuclear test would also fit North Korea 's pattern of serial provocations , analysts said .