Gary Chu competes in the 2006 Tornado Worlds in Argentina

They were the top finishing USA boat.

Here is final story and standings from Scuttlebutt:  

TORNADO WORLDS
(San Isidro, Argentina - Dec 10, 2006) On the final day of the Worlds, the
breeze under 6 knots kept the competitors waiting on the water to start Race
9. When the breeze finally picked up the RC had to move the course due to
the shallow conditions. By then only 1 race could be sailed and the
Australians won the title with one race to spare. The battle for second was
between local heroes Santiago Lange & Carlos Espinola (ARG) and Roman Hagara
& Hans Peter Steinacher (AUT). Both teams started together in the middle of
the starting line but the Argentineans went all the way to the right side of
the course while the Austrians decided for the middle. Santiago and Carlos
rounded in first, followed by Dutch Mitch Booth & Pim Nieuwenhis in second
and Spanish Fernando Echavarri & Anton Paz in third. The Austrians rounded
seventh, never able to overtake the Argentine's lead, thus falling to third
overall. -- Event website: http://tornado2006.cnsi.org.ar/

Final Standings after nine races (48 boats - one discard):
 1. Darren Bundock & Glenn Ashby (AUS) 23 pts
 2. Santiago Lange & Carlos Espinola (ARG) 37 pts
 3. Roman Hagara & Hans Peter Steinacher (AUT) 41 pts
 4. Iordanis Paschaladis & Constantinos Trigonis (GRE) 67 pts
 5. Yann Guichard & Alexandre Guyader (FRA) 77 pts
 16. Oskar Johansson & Kevin Stittle (CAN) 131 pts
 25. Robbie Daniel & Gary Chu 13 (USA)) 163 pts
 27. John Lovell & Charlie Ogletree (USA) 169 pts<