fox's allison barer explains. >> reporter: a big chunk of travelers this holiday weekend driving outaccording to aaa, there are 2.9% more drivers than last 4th of july. experts say that's a partly because gas across the country is cheaper. roughly four cents cheaper than a year ago. how long will that last? in may interview with bloomberg news, president trump said he would consider increasing the federal gas tax. the white house seemed to backtrack shortly after. >> there was no endorsement of it or support for it. he was just relaying what another industry group had shared with him about how to pay for the roads and bridges that need to be repaired. >> reporter: the american petroleum institute said americans pay a little more than taxes on every gallon of gas. for diesel, it's.55 per gallon. >> the gas tax certainlily finances the highway trust fund-most significant source of funding for building and improving federal highways with help from the states >> the last time lawmakers raised the federal gas tax was 1993. it hasn't been adjusted for inflation and the budget office said b

allison barer reports from washington, dc. >> reporter: north korean state run media is calling the u.scent military drill approve indication, u.s. military officials say two u.s. air force from anderson air force a base flew alongside south korea for a ten-hour sequence bilateral mission, the show of force the b 1bs flew over the korean peninsula and reportedly released inner weapon, u.s. officials called eight practice run in a direct response to north korea's recent launch of an inner continental ballistic missile. a newspaper run by the country's ruling party published commentary on sunday accusing the u.s. of quote, reckless military prove occasions that in their mine increased the threat of a nuclear war. when it comes to the >> all i amses are on the table >> how many times do we have to tell them no escalation? the fact that they launched an icbm test is hugely dangerous, not just for us, but for so many of our friends in the world. we've got to put a stop to it. >> reporter: president trump met with chinese president xi jinping at the summit and addressed north korea telling th