Attached files
file | filename |
---|---|
EX-32 - EX-32 - NORFOLK SOUTHERN CORP | nsc033121exhibit32.htm |
EX-31.B - EX-31.B - NORFOLK SOUTHERN CORP | nsc033121exhibit31b.htm |
EX-31.A - EX-31.A - NORFOLK SOUTHERN CORP | nsc033121exhibit31a.htm |
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