Going under ground zero, where a dangerous cleanup was underway | 60 Minutes Archive
Large chunks of debris crashed through underground basements during the 9/11 attacks. 60 Minutes visited several months afterwards, when an exhausting and dangerous cleanup effort was underway.
<p>Large chunks of debris crashed through underground basements during the 9/11 attacks. 60 Minutes visited several months afterwards, when an exhausting and dangerous cleanup effort was underway.</p>