This isn't that new, but some may not have seen it. It is a test of the SDB JDAM bunker buster penetrating a 10' steel reinforced concrete aircraft shelter. Caption reads:
http://www.webmutants.com/strategypage/bunker_buster_demo.mpeg
Click on the link to view the video, or right click and select save as:U.S. Air Force Small Diameter Bomb (SDB) takes out a bunker. The 250 pound SDB is designed to penetrate concrete or earth. The wings on the SDB in the video are actually an add-on (to be used on many smart bombs), called Diamond Back. If you add the Diamond Back kit, you increase the range of a smart bomb from about 16 kilometers, to 65 kilometers. The SDB is still in development, but may be available for service next year.
http://www.webmutants.com/strategypage/bunker_buster_demo.mpeg