Families of those killed in the Boston Marathon bombing have marked the 10th anniversary of the tragedy by laying wreaths at memorial sites near the finish line. The bombing killed 3 people and injured more than 260 others, and 2 police officers died as a result of pursuing the perpetrators, Dzhokhar and Tamerlan Tsarnaev. Jennifer Black from Ohio was one whose race was cut short – she attended the weekend’s commemoration event and said she returned to the city because “we have to look out for each other, and we have to pray for these families every day.” As for the race itself, it’s taken place overnight: Hellen Obiri won the women’s race, and Evans Chebet took it out for the men. Ahead of the big event, those brave enough got a chance to test if they could keep up with the men’s world record holder, Eliud Kipchoge. Hilarity ensued…