On 7th June, the RAND Corporation published a paper about materials have been developed with increasing multi-functionality and ability to survive in and respond to complex and challenging environments. It contains testimony presented before the US-China Economic and Security Review Commission on June 7th. It compares US and Chinese capabilities for these “metamaterials”, saying that China is pursuing a substantial research and development effort in metamaterials, and comments on US-China research collaborations. It refers to China’s domination of critical materials production and processing. Many of the materials that are critical for manufacturing, include the most well-known examples – metals of the rare earth family, which are essential to many technologies essential to both civilian and defence applications, such as chemical catalysts, lasers, high-power magnets, batteries, light-emitting diodes (LED), night-vision goggles, and computer hard drives. China has more than 50% of world production of 12 different critical materials — antimony, aluminium, bismuth, fluorspar, gallium, germanium, magnesium, rare earths, silicon, tellurium, tungsten, and vanadium.