"I don't think Ben Johnson would even get to London nowadays -- I think he would be picked up in advance, and many athletes now who think they can get there will be swept away by pre-Games testing, " Howman said.

CNN: Hi-tech tests to catch Olympics drug cheats at London 2012

The centerpiece of my collection is a 1960s work entitled "Big Bertha" by a pop artist named Ben Johnson, whom I hadn't heard of before, or for that matter since.

WSJ: The Art of Collecting