British athlete Iwan Thomas said what happened at the Boston Marathon last weekend has made him more determined to run at the London Marathon this weekend.
Home Secretary Theresa May has said the Metropolitan Police put more officers on duty at the London Marathon following the Boston bombs.
Iwan told Daybreak: "I'm really looking forward to Sunday, I suppose maybe, slightly in the back of my mind something could happen but in my eyes no. I'm gonna go out there and run".
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