North Korea’s nuclear weapons and defense scientists are set to take center stage next Monday as the country celebrates “Rocket Industry Day” for the first time. 

The new holiday falls on the fourth anniversary of the country’s most significant nuclear achievement — test-launching the Hwasong-15 intercontinental ballistic missile (ICBM) capable of striking Washington, D.C. — and it could serve as another chance for Pyongyang to send a message about its weapon development plans after holding a missile exhibition last month.

The holiday could also boost Kim Jong Un’s cult of personality as it will likely focus on his nuclear weapon