FILE - In this April 6, 2010 file photo, the Luzhniki Stadium which will be the venue of the World Athletics Championship scheduled for August 2013 in Moscow is shown. The organizers of the ... more 
FILE - In this April 6, 2010 file photo, the Luzhniki Stadium which will be the venue of the World Athletics Championship scheduled for August 2013 in Moscow is shown. The organizers of the championship said on Tuesday, April 16, 2013, they will beef up security in the wake of deadly explosions at the finish line of the Boston Marathon. (AP Photo/Misha Japaridze, File) less 
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Associated Press | Photo By Misha Japaridze, File
Tue, Apr 16, 2013 4:40 AM EDT