0000950109-00-001299 DEF 14A 1 20000511 20000331 NORFOLK SOUTHERN CORP 0000702165 4011 521188014 VA 1231 DEF 14A 34 001-08339 589953 THREE COMMERCIAL PL NORFOLK VA 23510-2191 8046292680 DEF 14A 1 000095010900001299-001-seq1-def-14a.txt DEFINITIVE PROXY MATERIAL