Meta Platforms said Friday it struck 20-year agreements to buy power from three Vistra nuclear plants in the US heartland and develop projects with two companies hoping to build small modular reactors.Shares of Oklo and Vistra surged more than 10%.Meta and other Big Tech companies want to secure long-term electricity supplies as artificial intelligence and data centers increase US power demand for the first time in two decades. 3 Meta and other Big Tech companies want to secure long-term electricity suppl ...