Kim Jong Un was all smiles after North Korea test-fired a new weapon.

Pyongyang’s Korean Central News Agency said Kim expressed “great satisfaction” over his military’s “mysterious and amazing success rates” in recent testing activity and vowed to build up “invincible military capabilities no one dare provoke,” the Associated Press reported.

One photo published by North Korea’s official newspaper showed Kim raising his fist and celebrating with military officials.

South Korea said the North fired off at least two short-range ballistic missiles Friday, the sixth time it’s launched weapons since July. The tests have revealed a new rocket artillery system and two short-range mobile ballistic missile systems that make it easier for the North to strike targets in South Korea, including U.S. military bases there.

Kim oversaw both Friday’s launch and one a week ago, despite sending a letter to President Trump apologizing for the recent rocket tests.

In a separate statement Saturday, the Korean Central News Agency criticized ongoing U.S.-South Korea military drills as an invasion rehearsal that forces North Korea to constantly develop “powerful physical means and their deployment for an actual war.”