Twenty years ago, a couple of fresh-faced young Turks teamed up at Cushman & Wakefield, forming what would be the most successful commercial real estate brokerage team in Atlanta, and one of the most successful in the U.S. Flash forward to 2006, and the two, John Shlesinger and Sam Holmes, now serve as vice chairmen -- two of only seven vice chairmen worldwide -- of the world’s largest and arguably most formidable real estate services firm in the world, CB Richard Ellis.