2006 Boston Marathon

Elite runner Alan Culpepper of Lafayette, Colo., center, crosses the start line of the 110th Boston Marathon today in Hopkinton, Mass.  (Lisa Poole / AP)

Uta Pippig, from Germany, three-time women’s Boston Marathon winner, cheers on the elite women runners at the start of the 110th Boston Marathon today in Hopkinton, Mass.  (Lisa Poole / AP)

The elite women’s division takes off at the starting line of the 110th Boston Marathon on Main St. in Hopkinton, Mass. The 26.2 mile race winds through the eastern part of the state and finishes in the capitol of Boston. Today’s race is the first in a competition that links five major races with a $1-million purse.  (Matthew Cavanaugh / EPA)

The 110th Boston Marathon elite runners lead the race after crossing the start line in Hopkinton, Mass. More than 20,000 runners crossed the start line and headed for the finish in Boston.  (Bizuayehu Tesfaye / AP)

U.S. runners Meb Keflezighi (11) and Alan Culpepper (10) lead the pack during the first mile of the Boston Marathon, in Hopkinton, Mass. Keflezighi finished third, while Culpepper finished fifth, helping the Amercians take five of the top 10 spots.  (Steven Senne / AP)

Dick Hoyt pushes his son Rick Hoyt at the start of the wheelchair division of the 110th Boston Marathon.  (Lisa Poole / AP)

Robert Cheruiyot, of Kenya (8), center, runs in the pack at about the two-mile mark of the Boston Marathon, in Hopkinton, Mass. Cheruiyot went on to win the race with a time of 2:07:14. Kenya’s Benjamin Maiyo (5), who finished second, appears left.  (Steven Senne / AP)

Meb Keflezighi of the U.S. crosses the finish line to finish third in the men’s division of the 110th Boston Marathon in Boston, Mass. He finished with a time of 2:09:56.  (Timothy A. Clary AFP/Getty Images)

Ernst Van Dyk of South Africa crosses the finish line of the 100th Marathon in Boston, Mass. Van Dyk won the men’s wheelchair division with an unofficial time of 1:25:29.  (CJ Gunther / EPA)

Kenya’s Robert Cheruiyot crosses the finish line to win the 110th running of the Boston Marathon.  (Michael Dwyer / AP)

Rita Jeptoo of Kenya approaches the finish line during the 110th running of the Boston Marathon.  (Darren McCollester / Getty Images)

Rita Jeptoo of Kenya holds the trophy in Boston after winning the women’s division of the 110th running of the Boston Marathon.  (Elise Amendola / AP)

Edith Hunkeler of Switzerland holds the trophy after winning the women’s wheelchair division of the 110th running of the Boston Marathon.  (Elise Amendola / AP)