Cruel Ones (UN-PE-0001)
Oswald was already an unstable character - an attention seeking left wing Marxist who had recently left the US Marines. Drifting between jobs he was eventually able to get temporary employment at the Texas School Book Depository.

4 weeks later a decision was made to route the visiting president's motorcade down Elm Street, directly in front of the building where Oswald was now working.

From this perfect vantage point and with the 16 dollar mail order rifle that he had purchased only a few moths earlier, Oswald famously assassinated President Kennedy and in return was thus rewarded with the fame or notoriety that he so desperately desired.

The idea of a string of events that places this particular man, in temporary employment in a building that allowed such unhindered access to the President lends less to coincidence - But more to design.