Editing Gerald Grinstein (section)

====Bankruptcy and restructuring====
Although these initiatives were largely successful, upward pressure on fuel prices and fierce competition from low-cost carriers continued to keep Delta perilously close to bankruptcy.  [[Hurricane Katrina]] resulted in a dramatic spike in jet fuel prices in [[Hartsfield-Jackson Atlanta International Airport|Atlanta]], which houses Delta's largest hub operation.  Delta, which had previously sold its fuel [[hedge (finance)|hedges]] in a move to raise cash, was forced into an untenable cash position.  On September 14, 2005, Delta and its subsidiaries filed a petition for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code.  At the time of the bankruptcy filing, Delta's total debt was approximately $23.8 billion.

During Delta's bankruptcy, Grinstein and his management team accelerated the restructuring process that they had started in 2004.  Delta shed non-performing assets, slashed the mainline fleet from nine models to five, and shed thousands of jobs.  By 2007, Delta's mainline operation employed approximately 47,000, down from a high of 78,000 in 2001.  Grinstein negotiated a second concessionary agreement from ALPA, imposed a second round of paycuts on nonunion employees, and froze the nonunion employee pension plan.  He reduced his own pay by 25%, to approximately $325,000 per year.

Grinstein also oversaw a major restructuring of Delta's network footprint, closing the airline's [[Dallas/Fort Worth International Airport|Dallas–Fort Worth]] hub and cutting domestic flight schedules across the remaining hubs in an effort to redeploy aircraft and personnel to more profitable international markets.  Delta entered more than 50 new international markets between 2005 and 2007 and since its merger with [[Northwest Airlines]] in 2008 has become the world's largest carrier.

In November 2006, [[US Airways]] launched an unsolicited [[Takeover#Hostile|hostile takeover bid]] for Delta, which Grinstein and his executive team led by [[Jim Whitehurst]] and Edward Bastian defeated by supporting the employee-led "Keep Delta My Delta" campaign.<ref>MICHELE NORRIS. [https://web.archive.org/web/20160310182801/https://www.highbeam.com/doc/1P1-133965113.html "Congress Looks at Possible Delta-US Air Merger."] NPR All Things Considered. National Public Radio. January 24, 2007.</ref>