Is Nike’s ‘Breaking2’ marathon bid more than a marketing stunt?

Last Saturday (6 May) Nike enlisted three of the athletes it sponsors – Lelisa Desisa, Eliud Kipchoge and Zersenay Tadese – to attempt something ambitious; break the two-hour barrier for a full marathon run.
Prior to Nike’s attempt the fastest marathon time ever recorded was 2:02:57 by Kenyan runner Dennis Kipruto Kimetto in Berlin back in 2014. Shaving another three minutes off that would be a big achievement; it took 16 years to shave off the previous three years.
However, Ni