Group 1 - The "Iron Dome" missile defense system has been officially selected by Trump, with a budget of $175 billion and a completion target by January 2029 [1][2][3] - The system aims to intercept hypersonic missiles, ballistic missiles, and advanced cruise missiles, incorporating space-based sensors and interceptors [1][2] - The project is seen as a cornerstone of Trump's military strategy to counter perceived threats from China and Russia [5] Group 2 - There are significant concerns regarding the feasibility and cost of the "Iron Dome" project, with estimates suggesting that space-based components alone could exceed $500 billion over 20 years [2][3] - The involvement of companies like SpaceX in the project has raised questions, particularly from Democratic lawmakers who are calling for an investigation into potential conflicts of interest [4] - The Chinese government has expressed serious concerns about the "Iron Dome" plan, viewing it as a move that could escalate the arms race and undermine international security [5]