Mesa's USA SWIMkids prepares for Blake's Miracle

Matt Grevers and Annie Chandler

U.S. swim team members Matt Grevers and Annie Chandler will pass out medals to participants at this year's Blake's Miracle event at Mesa's USA SWIMkids.

David J. Phillip

London Olympics Swimming Men

United States' Matthew Grevers, left, and United States' Nick Thoman react after the men's 100-meter backstroke swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Monday, July 30, 2012. Grevers won gold, Thoman silver. (AP Photo/David J. Phillip)

Mark J. Terrill

London Olympics Swimming Men

United States' Matthew Grevers, left, and United States' Nick Thoman celebrate following the men's 100-meter backstroke swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Monday, July 30, 2012. Grevers won gold, and Thoman silver. At back is Britain's Liam Tancock. (AP Photo/Mark J. Terrill)