Independent researcher Adam Johnson emailed the FBI this morning to ask them about who built the bombs that detonated at the Boston marathon in April 2013. The Bureau and DOJ have admitted in court that they do not know who built the bombs, or where they were built.

Here's the exchange:

The FBI has no comment on who built the bombs that exploded at the finish line of the Boston marathon, two weeks into jury selection in the Tsarnaev trial. Take from that what you wish.