The Wall Street Journal: The U.S. 13-ton super bomb failed to penetrate the Houthi rebels' shelter. According to U.S. media reports, the U.S. Air Force B-2 stealth strategic bomber recently used the GBU-57 heavy guided penetration bomb in its combat operations against the Houthi rebels in Yemen. According to public data, this airborne munition manufactured by Boeing can penetrate more than 60 meters deep into the ground and pierce 19 meters of reinforced concrete. However, this time, this high-tech weapon of the U.S. military was unable to destroy the missile system manufactured by the Houthis and hidden underground. According to The Wall Street Journal's report, the missile strike from the B-2 only destroyed a few entrances to the Houthi tunnels, and Houthi personnel were still able to quickly restore access to the underground facilities by building new entrances. As domestic defense experts in the United States said, the penetration capability of the GBU-57 is actually not as powerful as claimed, and it did not demonstrate the expected effectiveness in this practical use. Original article: https://www.toutiao.com/article/1828254890380361/ Disclaimer: This article represents the views of the author.