A version of this story first appeared in CNN Business’ Before the Bell newsletter. Not a subscriber? You can sign up right here.US gas prices hit their highest level in seven years during a busy Memorial Day weekend, as Americans traveled to meet up with friends and took much-needed vacations.What’s happening: Data from GasBuddy shows gas in the United States is at its most expensive since 2014. AAA puts the national average at $3.05 per gallon, up from $2.90 one month ago and $1.98 a year ago.GasBuddy analyst Patrick De Haan said his firm observed “very strong US gasoline demand for Memorial Day weekend.” Ongoing supply shortages following the Colonial Pipeline hack are also propping up prices.As of last Thursday, 25% of gas stations in

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