According to the US Fox News website reported on the 21st, flight tracking data and voice communication with air traffic controllers show that six B-2 stealth bombers from Whiteman Air Force Base in Missouri appear to be flying to the US Air Force Base in Guam. < b > The report said that the six B-2 bombers carried out aerial refueling after taking off from Missouri, indicating that their onboard payload was too heavy. Fox News website analysis, the payload may be a giant earth-penetrating bomb that experts say can destroy Iran's Fordow underground uranium enrichment facility. US media reports that US President Trump has been weighing whether to attack Iran's well-protected underground uranium enrichment facility. Media generally believe that, in addition to a certain number of GBU-57A/B giant earth penetrating bombs, other conventional weapons are difficult to completely destroy this deep underground nuclear facility. CNN reported that the US Air Force B-2 bomber is currently the only model that can deliver GBU-57A/B giant earth penetrating bombs in actual combat.