Forty-three world records were broken at the 2009 World Swimming Championships, in Rome.

NEWYORKER: Glory Days

Among the newer faces to watch for: Tachibaya Miya, an individual bronze medalist at the World Swimming Championships in Perth last month.

CNN: Japan evens the odds

It has also bid for the 2014 European swimming championships and the 2015 Track Cycling world championships.

BBC: Mo Farah

Both Simmonds and Frederiksen broke world records in the S6 and S8 400m freestyle respectively at last month's British Swimming Championships in Sheffield.

BBC: Simmonds heads GB swimming team

Armstrong had hoped to compete at the Masters South Central Zone Swimming Championships in his home town of Austin this weekend, thinking it was not subject to USA or World Anti-Doping Agency codes.

CNN: Lance Armstrong's return to competition sunk