Exhibit 4 ACKNOWLEDGMENT AND AGREEMENT TO THE AMENDED AND RESTATED REGISTRATION RIGHTS AGREEMENT WHEREAS, pursuant to a Participation Warrant Agreement, Delta Air Lines, Inc. ("Delta") received a warrant to purchase 18,619,402 shares of common stock...Registration Rights Agreement • July 21st, 1999 • Delta Air Lines Inc /De/ • Air transportation, scheduled
Exhibit 5 ASSIGNMENT OF CERTAIN REGISTRATION RIGHTS This Assignment of Certain Registration Rights (the "Assignment") dated as of July 16, 1999, by and among Jay S. Walker, Richard S. Braddock and The Jay S. Walker Irrevocable Credit Trust...Assignment of Certain Registration Rights • July 21st, 1999 • Delta Air Lines Inc /De/ • Air transportation, scheduled
