What world-changing even occurred at promontory summit, utah ? why was it world-changing ?

churchill warned that the soviet union had cut eastern europe off from the west with an "iron curtain."

give me brainliest

brainliest is someone you pick by simply clicking a button. it only shows up if there are two people that answered your question, then you decide who answer more accurately with detail and explanation and you give that person the title "brainliest".

i hope this your understandings.