The United States, Japan and South Korea have imposed fresh sanctions on North Korean individuals and entities in response to Pyongyang’s recent slew of missile tests. The AFP press agency reports that Washington’s action, announced Thursday, blocks any assets of three North Korean officials in the United States, a largely symbolic step against an isolated country that has defied international pressure over its weapons programs. The recent North Korean missile launches, including the test of an intercontinental ballistic missile with the range to hit the US mainland, “pose grave security risks to the region and entire world,” Secretary of State Antony Blinken said in a statement.