sentences:  On 15 October 2007 Kitty Hawk, Inc. filed again for Chapter 11 bankruptcy.On 29 October 2007 Kitty Hawk, Inc. announced it would cease all scheduled network Air and Ground operations, effective immediately, but that it would continue to operate air cargo charter shipments.On 20 November 2007 Kitty Hawk Air Cargo began flying for DHL for a two-week minimum, shipping DHL's freight domestically.