It has been two weeks since two homemade bombs exploded near the finish line of the Boston Marathon, killing three people and wounding 260. In those two weeks, we have learned much about what happened and why. We have learned about the innocent victims of the attack, as well as about the deranged young brothers who allegedly carried it out. We have watched a dramatic 24-hour manhunt that paralysed the city and ended with one brother dead and the other handcuffed to a hospital bed. The story of what happened in Boston has emerged gradually, with new information appearing daily. Early inaccurate reports have been revised, and early mysteries have been resolved. There are still some questions to answer, but after two weeks, the picture is coming into sharper focus. The story below is what we know so far. It is based on eyewitness statements and photos, press conferences, criminal complaints, and the reporting of more than a dozen media organisations, including this one. (Please see the last page of this story for specific sources and credits.) Monday Martin loved sports. He was a Red Sox fan, and he played Little League. He had a big black infielder’s glove, and…