Gas is averaging $4 a gallon, again, as the U.S. and Iran launch more attacks

U.S. gas prices jumped to an average of $4 a gallon again Monday as the U.S. and Iran launched more attacks.According to motor club federation AAA, the national average for a gallon of regular gasoline is now back to $4. The average price a year ago was $3.14 a gallon.The price is a national average, meaning drivers in some states have been paying well over $4 a gallon for a while now, while others pay less. Prices vary between states due to factors ranging from nearby supply to differing tax ra...