2012 Thruster 700c fixie bike

What happened

Just bought a brand new fixed gear bike(walmart - Thruster 700c fixie bike) and this was my first time riding my bike into work at the CBOE building on Van Buren and Lasalle. Parked the bike at 7am. Went back out at about 9:30am to check in on it and the bike was still there. At the end of the work day at 5pm the bike(and lock) was completely gone. Dozens of bikes are in this area...but they took mine. I think they were able to figure out the combination to the bike lock. Next time I'm getting U Lock with a flat key. And a huge guard dog.

Bike details

Type

Fixed Gear / Track Bike

Color

Black w/ red and yellow wheels/tires

Size

Large

Condition

Brand Spankin new

Theft circumstances

Date

Sep 13, 2012

Lock type

Combination Cable Lock

Locked to

Locked to bike rack.

How locked

Locked through both wheels and frame to object.

How defeated

Lock is missing, along with the bike.

Duration

Between 9am and 5pm(9/13/2012)

Area

Sidewalk in front of an open business.