AUKUS to Develop , Hypersonic Missiles Amid Concerns , Over China's Military Assertiveness.br On April 5, the United States, United Kingdom br and Australia announced that they will work br together on a hypersonic missile project. .br On April 5, the United States, United Kingdom br and Australia announced that they will work br together on a hypersonic missile project. .br NBC reports that the three nations br teamed up to create the security alliance br known as AUKUS in September. .br NBC reports that the three nations br teamed up to create the security alliance br known as AUKUS in September. .br The alliance was formed amid br growing concerns over China's increased br military presence in the Pacific. .br The alliance was formed amid br growing concerns over China's increased br military presence in the Pacific. .br U.S. President Joe Biden, br British Prime Minister Boris Johnson br and Australian Prime Minister Scott Morrison , said in a joint statement that they are committed to: .br U.S. President Joe Biden, br British Prime Minister Boris Johnson br and Australian Prime Minister Scott Morrison , said in a joint statement that they are committed to: .br ... new trilateral cooperation on hypersonics br and counter-hypersonics, and electronic br warfare capabilities, as well as to expand br information sharing and to deepen br cooperation on defense innovation, AUKUS joint statement, via NBC.br ... new trilateral cooperation on hypersonics br and counter-hypersonics, and electronic br warfare capabilities, as well as to expand br information sharing and to deepen br cooperation on defense innovation, AUKUS joint statement, via NBC.br NBC reports that the U.S., Russia and China have br all invested in developing hypersonic missiles. .br Hypersonic weapons systems are designed br to be so fast that modern missile defense br systems are unable to intercept them. .br Hypersonic weapons systems are designed br to be so fast that modern missile defense br systems are unable to intercept them. .br In October, U.S. General Mark Milley br confirmed that China had already br tested a hypersonic weapon system. .br In October, U.S. General Mark Milley br confirmed that China had already br tested a hypersonic weapon system. .br General Milley, the chairman of the Joint Chiefs of Staff, told Bloomberg Television that the Chinese test was a , "very significant event of a test of a hypersonic weapon system, and it is very concerning.".br General Milley, the chairman of the Joint Chiefs of Staff, told Bloomberg Television that the Chinese test was a , "very significant event of a test of a hypersonic weapon system, and it is very concerning.".br Russia has also reportedly been accused of using hypersonic missiles in its invasion of Ukraine.