Michael Johnson
2:54.20 by USA in 1998
Michael Johnson: 43.18 seconds.
43.18 seconds set by Michael Johnson in 1999 is still the current world record
The Olympic 400m men freestyle record is 3:40.59 by Ian Thrope.
Ian Thorpe (Australia) July 30, 2002 Time: 3:40.08
9.58 secs
22:03
1:40.91
22:17 record set by Pre
Wilson Kipketer
12.87