Russian President Vladimir Putin has revoked Russia's ratification of the Comprehensive Nuclear Test Ban Treaty in line with the United States' position. The move has been widely criticized and seen as a step in the wrong direction, undermining international arms control. The CTBT has not been ratified by several other countries, including China, India, Pakistan, North Korea, Israel, Iran, and Egypt. Russia's revocation has raised concerns about the resumption of nuclear weapon tests. In response, Russia has conducted a large-scale nuclear strike drill.