Exhibit 101.1 Interactive Date Files

Exhibit 10.23

INFORMATION IN THIS EXHIBIT IDENTIFIED BY BRACKETS IS CONFIDENTIAL AND HAS BEEN EXCLUDED PURSUANT TO ITEM 601(B)(10)(IV) OF REGULATION S-K BECAUSE IT IS BOTH (I) NOT MATERIAL AND (II) THE TYPE THAT FEDEX TREATS AS PRIVATE OR CONFIDENTIAL.

Supplemental Agreement No. 6

to

Purchase Agreement No. 3157

between

The Boeing Company

And

Federal Express Corporation

Relating to Boeing Model 777-FREIGHTER Aircraft

THIS SUPPLEMENTAL AGREEMENT, entered into as of the 17 th day of March 2010, by and between THE BOEING COMPANY (Boeing) and FEDERAL EXPRESS CORPORATION (Customer);

W I T N E S S E T H :

WHEREAS, the parties entered into that certain Purchase Agreement No. 3157, dated November 7, 2006 ( Purchase Agreement ), relating to the purchase and sale of certain Boeing Model 777-FREIGHTER Aircraft (the Aircraft );

WHEREAS, the parties entered into an Aircraft General Terms Agreement, dated November 7, 2006, as incorporated by reference into the Purchase Agreement (AGTA);

WHEREAS, Customer anticipates, pursuant to that certain Purchase Agreement Assignment between [ * ] and Customer (Assignment Agreement), taking delivery from Boeing of one (1) new Boeing model 777-F aircraft with manufacturing serial number [ * ]; and

WHEREAS, Boeing and Customer desire that, for the purposes of post-delivery support and operation, [ * ].

P.A. 3157

Supplemental Agreement #6

S6 - 1

Supplemental Agreement 6 to

Purchase Agreement No. 3157

NOW THEREFORE, in consideration of the mutual covenants herein contained, the parties hereto agree to supplement the Purchase Agreement as follows:

All terms used herein and in the Purchase Agreement, and not defined herein, shall have the same meaning as in the Purchase Agreement.

[ * ]

8. Effectiveness.

The matters, rights, obligations, mutual covenants and entitlements of Boeing and Customer shall be effective upon Customer taking title to [ * ]. Should Customer not take title to [ * ] pursuant to the Assignment Agreement, for any reason, the matters, rights, obligations, mutual covenants and entitlements of Boeing and Customer set forth in this Supplemental Agreement shall be null and void.

EXECUTED as of the day and year first above written.

P.A. 3157

Supplemental Agreement #6

S6 - 2

Supplemental Agreement No. 7

to

Purchase Agreement No. 3157

between

The Boeing Company

And

Federal Express Corporation

Relating to Boeing Model 777-FREIGHTER Aircraft

THIS SUPPLEMENTAL AGREEMENT, entered into as of the 17 th day of March 2010, by and between THE BOEING COMPANY (Boeing) and FEDERAL EXPRESS CORPORATION (Customer);

W I T N E S S E T H :

WHEREAS, the parties entered into that certain Purchase Agreement No. 3157, dated November 7, 2006 ( Purchase Agreement ), relating to the purchase and sale of certain Boeing Model 777-FREIGHTER Aircraft (the Aircraft );

WHEREAS, the parties entered into an Aircraft General Terms Agreement, dated November 7, 2006, as incorporated by reference into the Purchase Agreement (AGTA);

WHEREAS, Customer anticipates acquiring and taking delivery of one (1) used Boeing model 777-F aircraft with manufacturing serial number [ * ];

WHEREAS, Boeing and Customer desire that, for the convenience of the parties, for purposes of post-delivery support and operation of [ * ].

NOW THEREFORE, in consideration of the mutual covenants herein contained, the parties hereto agree to supplement the Purchase Agreement as follows:

P.A. 3157

Supplemental Agreement #7

S7 - 1

Supplemental Agreement 7 to

Purchase Agreement No. 3157

All terms used herein and in the Purchase Agreement, and not defined herein, shall have the same meaning as in the Purchase Agreement.

[ * ]

10. Effectiveness.

The matters, rights, obligations, mutual covenants and entitlements of Boeing and Customer shall be effective upon Customer taking title to [ * ]. Customer agrees to provide written notice to Boeing regarding the date Customer takes title to [ * ]. Should Customer not take title to [ * ], for any reason, the matters, rights, obligations, mutual covenants and entitlements of Boeing and Customer set forth in this Supplemental Agreement shall be null and void.

EXECUTED as of the day and year first above written.

P.A. 3157

Supplemental Agreement #7

S7 - 2

Supplemental Agreement No. 8

to

Purchase Agreement No. 3157

between

The Boeing Company

And

Federal Express Corporation

Relating to Boeing Model 777-FREIGHTER Aircraft

THIS SUPPLEMENTAL AGREEMENT, entered into as of the 30 th day of April 2010, by and between THE BOEING COMPANY (Boeing) and FEDERAL EXPRESS CORPORATION (Customer);

W I T N E S S E T H :

WHEREAS, the parties entered into that certain Purchase Agreement No. 3157, dated November 7, 2006 (Purchase Agreement), relating to the purchase and sale of certain Boeing Model 777-FREIGHTER Aircraft (the Aircraft); and

WHEREAS, Customer desires to add four (4) new Aircraft to the Purchase Agreement with delivery months as follows;

S8 - 1

Supplemental Agreement 8 to

Purchase Agreement No. 3157

NOW THEREFORE, in consideration of the mutual covenants herein contained, the parties hereto agree to supplement the Purchase Agreement as follows:

All terms used herein and in the Purchase Agreement, and not defined herein, shall have the same meaning as in the Purchase Agreement.

S8 - 2

Supplemental Agreement 8 to

Purchase Agreement No. 3157

EXECUTED as of the day and year first above written.

S8 - 3

Supplemental Agreement 8 to

Purchase Agreement No. 3157

TABLE OF CONTENTS

Supplemental Agreement 8 to

Purchase Agreement No. 3157

Supplemental Agreement 8 to

Purchase Agreement No. 3157

April 30, 2010

6-1162-RRO-1144

Federal Express Corporation

2955 Republican Drive

Memphis, TN 38118

Dear Mr. Burkhart:

In consideration of the strong business relationship between Boeing and Customer, and Customer executing Supplemental Agreement No. 8, Boeing has agreed to [ * ].

Further Customer agrees and acknowledges that Attachment A cannot be revised/modified in anyway unless specifically agreed to in writing by Boeing.

BOEING PROPRIETARY

Federal Express

PA 3157

[ * ]

BOEING PROPRIETARY

Federal Express

PA 3157

[ * ]

BOEING PROPRIETARY

FED-PA—LA-1000790

Federal Express Corporation

3610 Hacks Cross

Memphis TN 38125

This letter agreement (Letter Agreement) amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement have the same meaning as in the Purchase Agreement.

[ * ]

8. ADVANCE PAYMENT SETOFF RIGHTS

Customer agrees that if it defaults on any monetary obligation under the Purchase Agreement and has failed to cure such default within five (5) calendar days of receiving written notice from Boeing, then Boeing may apply any/all advance payments paid by Customer to cure, in part or in whole, any default made with respect to any Aircraft or other obligation in the Purchase Agreement. In the event that Boeing exercises such setoff rights and applies any advance payments to cure any such default by Customer with respect to an Aircraft or other obligation in the Purchase Agreement, Boeing will be entitled to require Customer to replace within ten days of written notice, the amount of advance payments applied to cure such default such that the total amount of advance payments will be restored to the aggregate amount of advance payments owed at that time by Customer.

[ * ]

10. PUBLIC ANNOUNCEMENT

Notwithstanding the terms in the Purchase Agreement, neither Party shall in any manner advertise or make any public statement regarding Customer’s purchase of the Block C Aircraft without the prior written consent of the other Party. Neither Party shall disclose any details of this Agreement to any third party except as may be authorized in writing by an authorized officer of the other Party.

Confidential Treatment . Customer understands that certain commercial and financial information contained in this Letter Agreement /and attachment(s) hereto is considered by Boeing as confidential. Customer agrees that it will treat this Letter Agreement and the information contained herein as confidential and will not, without the prior written consent of Boeing, disclose this Letter Agreement or any information contained herein to any other person or entity.

BOEING PROPRIETARY

If the foregoing correctly sets forth your understanding of our agreement with respect to matters described above, please indicate your acceptance and approval below.

Omitted Attachments

Certain attachments to this exhibit regarding delivery and pricing of certain B777F aircraft manufactured by The Boeing Company for FedEx have been omitted pursuant to Item 601(a)(5) of Regulation S-K because the information contained therein is not material and is not otherwise publicly disclosed. FedEx will furnish supplementally copies of these attachments to the Securities and Exchange Commission or its staff upon request.

BOEING PROPRIETARY