What is the main conflict in Thunderstruck by Erik Larson?

Thunderstruck by Eric Larson is a non-fiction book with two main narrative threads. One story is that of the invention and development of wireless communication by Guglielmo Marconi and his associates. The second is the role that wireless played in apprehending the accused killer in a London murder case that was the sensation of its time. Both stories take place mainly during the first decade of the twentieth century in the reign of Britain's Edward VII, during a period known as the Edwardian age.