1. INTRODUCTION

2. DATA AND ANALYSIS
2.1. Sample Definition
2.2. Data Reduction and Analysis
2.3. Surface Brightness Profiles and Concentration Measurements
2.5. Comparing Aperture and 3-D Model Temperatures

3. RESULTS
3.1. Cooling Time and Entropy Profiles
3.2. Distribution of Central Entropy, Cooling Time, and Cooling Rate
3.3. Evolution of Cooling Flow Properties
3.4. Evolution of Cluster Surface Brightness Profiles

4. DISCUSSION
4.1. The Origin of Cool Cores
4.2. The Evolution of ICM Cooling
4.3. The Cool Core / Cooling Flow Fraction
4.4. Potential Biases

5. SUMMARY