Core Viewpoint - The U.S. President Trump announced plans to mandate the use of steam catapults and hydraulic elevators in future U.S. aircraft carriers during his visit to Japan, emphasizing the reliability and cost-effectiveness of steam technology over electromagnetic systems [2]. Group 1: Announcement Details - Trump stated he would sign an executive order requiring new U.S. aircraft carriers to utilize steam catapults and hydraulic elevators [2]. - During his speech, Trump engaged with U.S. Navy personnel, asking for their opinions on steam versus electromagnetic catapults, with a preference expressed for steam [2]. - He criticized electromagnetic catapults as "stupid" and "absurd," highlighting their high costs and maintenance issues despite the presence of top talent [2]. Group 2: Technical Comparisons - Trump noted that steam catapults have been in use for 50 years and perform comparably to electromagnetic systems while being more reliable and easier to repair [2]. - He expressed a preference for the visual spectacle of steam catapult launches on aircraft carriers, suggesting that electromagnetic systems would detract from this experience [2].