<a href="https://en.wikipedia.org/wiki/Lehman_Brothers" id="mwAX0" rel="mw:WikiLink" title="Lehman Brothers">Lehman Brothers</a> files for <a href="https://en.wikipedia.org/wiki/Chapter_11,_Title_11,_United_States_Code" id="mwAX4" rel="mw:WikiLink" title="Chapter 11, Title 11, United States Code">Chapter 11</a> bankruptcy, the largest bankruptcy filing in U.S. history.