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SALT LAKE CITY, UT - APRIL 20: Runners arrive before dawn to increased security before the start of the Salt Lake City Marathon on April 20, 2013 in Salt Lake City, Utah. Due to the bombings at the Boston Marathon on April 15, security was dramatically increased by law enforcement and Utah National Guard at the Salt Lake City Marathon. Organizers are asking spectators to leave backpacks at home. (Photo by George Frey/Getty Images) ( 167097216 )

SALT LAKE CITY, UT - APRIL 20: A runner grabs a bracelet to honor the victims of the Boston Marathon bombing before the start of the Salt Lake City Marathon on April 20, 2013 in Salt Lake City, Utah. Due to the bombings at the Boston Marathon on April 15, security was dramatically increased by law enforcement and Utah National Guard at the Salt Lake City Marathon. Organizers are asking spectators to leave backpacks at home. (Photo by George Frey/Getty Images) ( 167097807 )

SALT LAKE CITY, UT - APRIL 20: Runners surround a bomb squad truck before the start of the Salt Lake City Marathon on April 20, 2013 in Salt Lake City, Utah. Due to the bombings at the Boston Marathon on April 15, security was dramatically increased by law enforcement and Utah National Guard at the Salt Lake City Marathon. Organizers are asking spectators to leave backpacks at home. (Photo by George Frey/Getty Images) ( 167097212 )

Members of the Utah National Guard 85th Civil Support Team use bomb sensing equipment to monitor the Salt Lake City Marathon in Salt Lake City, Utah, April 20, 2013. The Salt Lake City Marathon is the first major marathon since the April 15 bombing at the finish line of the Boston Marathon that claimed three lives. REUTERS/Jim Urquhart ( USA/ )

SALT LAKE CITY, UT - APRIL 20: Runners head off the starting line to start the Salt Lake City Marathon on April 20, 2013 in Salt Lake City, Utah. Due to the bombings at the Boston Marathon on April 15, security was dramatically increased by law enforcement and Utah National Guard at the Salt Lake City Marathon. Organizers are asking spectators to leave backpacks at home. (Photo by George Frey/Getty Images) ( 167097801 )

SALT LAKE CITY, UT - APRIL 20: Runners run through Sugar House Park during the Salt Lake City Marathon on April 20, 2013 in Salt Lake City, Utah. Due to the bombings at the Boston Marathon on April 15, security was dramatically increased by law enforcement and Utah National Guard at the Salt Lake City Marathon. Organizers are asking spectators to leave backpacks at home. (Photo by George Frey/Getty Images) ( 167097759 )

SALT LAKE CITY, UT - APRIL 20: Thousands of runners wait for the start of the Salt Lake City Marathon on April 20, 2013 in Salt Lake City, Utah. Due to the bombings at the Boston Marathon on April 15, security was dramatically increased by law enforcement and Utah National Guard at the Salt Lake City Marathon. Organizers are asking spectators to leave backpacks at home. (Photo by George Frey/Getty Images) ( 167097762 )

SALT LAKE CITY, UT - APRIL 20: A runner wears a yellow shirt to honor the victims of the Boston Marathon bombing at the start of the Salt Lake City Marathon on April 20, 2013 in Salt Lake City, Utah. Due to the bombings at the Boston Marathon on April 15, security was dramatically increased by law enforcement and Utah National Guard at the Salt Lake City Marathon. Organizers are asking spectators to leave backpacks at home. (Photo by George Frey/Getty Images) ( 167097769 )

SALT LAKE CITY, UT - APRIL 20: A runner wears a Boston Celtics shirt to honor the victims of the Boston Marathon bombing at the start of the Salt Lake City Marathon on April 20, 2013 in Salt Lake City, Utah. Due to the bombings at the Boston Marathon on April 15, security was dramatically increased by law enforcement and Utah National Guard at the Salt Lake City Marathon. Organizers are asking spectators to leave backpacks at home. (Photo by George Frey/Getty Images) ( 167097795 )

A member of law enforcement monitors the start of the Salt Lake City Marathon in Salt Lake City, Utah, April 20, 2013. The Salt Lake City Marathon is the first major marathon since the April 15 bombing at the finish line of the Boston Marathon that claimed three lives. REUTERS/Jim Urquhart ( USA/ )

Bomb sniffing dogs patrol before the start of the Salt Lake City Marathon in Salt Lake City, Utah, April 20, 2013. The Salt Lake City Marathon is the first major marathon since the April 15 bombing at the finish line of the Boston Marathon that claimed three lives. REUTERS/Jim Urquhart ( USA/ )

Becky Sondag, center, wins the women's division of the Salt Lake City marathon at Liberty Park, Saturday, April 20, 2013, in Salt Lake City. Salt Lake City Police Chief Chris Burbank, left, and Mayor Ralph Becker hold the finish line tape. (AP Photo/The Salt Lake Tribune, Chris Detrick) ( Salt Lake Marathon )

SALT LAKE CITY, UT - APRIL 20: Runners cross the finish line at the Salt Lake City Marathon on April 20, 2013 in Salt Lake City, Utah. Due to the bombings at the Boston Marathon on April 15, security was dramatically increased by law enforcement and Utah National Guard at the Salt Lake City Marathon. Organizers are asking spectators to leave backpacks at home. (Photo by George Frey/Getty Images) ( 167099411 )

SALT LAKE CITY, UT - APRIL 20: Runners wearing a 4-15-13 Boston Marathon shirt cross the finish line at the Salt Lake City Marathon on April 20, 2013 in Salt Lake City, Utah. The shirt was created to honor those killed or injured in the Boston Marathon bombing and also for those that were unable to finish the race. Due to the bombings at the Boston Marathon on April 15, security was dramatically increased by law enforcement and Utah National Guard at the Salt Lake City Marathon. Organizers are asking spectators to leave backpacks at home. (Photo by George Frey/Getty Images) ( 167099416 )

SALT LAKE CITY, UT - APRIL 20: A helicopter flies over the finish line of the Salt Lake City Marathon on April 20, 2013 in Salt Lake City, Utah. Due to the bombings at the Boston Marathon on April 15, security was dramatically increased by law enforcement and Utah National Guard at the Salt Lake City Marathon. Organizers are asking spectators to leave backpacks at home. (Photo by George Frey/Getty Images) ( 167099418 )

SALT LAKE CITY, UT - APRIL 20: Security personnel patrol the area around the finish line at the Salt Lake City Marathon on April 20, 2013 in Salt Lake City, Utah. Due to the bombings at the Boston Marathon on April 15, security was dramatically increased by law enforcement and Utah National Guard at the Salt Lake City Marathon. Organizers are asking spectators to leave backpacks at home. (Photo by George Frey/Getty Images) ( 167101166 )

A competitor runs with the American flag to the finish line of the Salt Lake City marathon, Saturday, April 20, 2013, Salt Lake City. (AP Photo/Melissa Majchrzak) ( Salt Lake City Marathon )

SALT LAKE CITY, UT - APRIL 20: Runners from the Boston 4:09 group stand at the finish line at the Salt Lake City Marathon on April 20, 2013 in Salt Lake City, Utah. The group wanted to cross the finish line at the same time the bombs went off at the Boston Marathon in honor of those that were killed, injured, or not able to finish the race. Due to the bombings at the Boston Marathon on April 15, security was dramatically increased by law enforcement and Utah National Guard at the Salt Lake City Marathon. Organizers are asking spectators to leave backpacks at home. (Photo by George Frey/Getty Images) ( 167101173 )

SALT LAKE CITY, UT - APRIL 20: Runners from the Boston 4:09 group pose for a picture in front of a banner signed by thousands of runners at the finish line at the Salt Lake City Marathon on April 20, 2013 in Salt Lake City, Utah. The group wanted to cross the finish line at the same time the bombs went off at the Boston Marathon in honor of those that were killed, injured, or not able to finish the race. Due to the bombings at the Boston Marathon on April 15, security was dramatically increased by law enforcement and Utah National Guard at the Salt Lake City Marathon. Organizers are asking spectators to leave backpacks at home. (Photo by George Frey/Getty Images) ( 167101172 )

A couple poses for a photo in front of a bomb squad truck before the Salt Lake City Marathon in Salt Lake City, Utah, April 20, 2013. The Salt Lake City Marathon is the first major marathon since the April 15 bombing at the finish line of the Boston Marathon that claimed three lives. REUTERS/Jim Urquhart ( USA/ )

Zianibeth Shattuck-Owen and her son Ethan Owen hug after she finished the Salt Lake City Marathon, on Saturday, April 20, 2013, Salt Lake City. Shattuck-Owen, who ran in the Boston marathon, was pulled one mile before the finish of the race because of the bombings. (AP Photo/Melissa Majchrzak) ( Salt Lake City Marathon )