Boston marathon

The U.S. Attorneys' Office and the FBI have been releasing official reports about their investigation of the Boston Marathon bombing, but there's also been amateur sleuthing taking place online at sites like Reddit and 4Chan.

After the bombings in Boston, authorities in London are looking at their own security arrangements in advance of Sunday's London marathon.

The day after bombings at the Boston Marathon, one business is concentrated on what matters — their employees.

The story of the Boston bombing through business owners who chose to reopen the day after. For them business is about community, not just money.

How cell phone and surveillance video is gathered and and processed to find clues, and track the perpetrators of the fatal attack in Boston.

A list of how you can assist those in Boston, whether you're nearby or from afar.

A day after three people were killed and over 130 injured by two bombings at the Boston Marathon, the search for answers is well underway.

There were two explosions near the finish line of the major race this afternoon, right in the heart of commercial Boston.