The national average gas price rose to $4.39 per gallon, in its biggest one-day jump since a ceasefire with Iran was announced on April 7. The national average gas price rose to a fresh wartime high of $4.39 per gallon in its biggest one-day jump since a ceasefire with Iran was announced on April 7. It was also the biggest one day jump since early March. On Thursday, gas prices jumped s... [5625 chars]