I did a google search to find out the number of suicides by bomb as distinct from suicide/mass homicide by bomb. Nothing on any of the sites about suicide methods, including a CDC report about suicide methods had any stats of suicide by bomb. I admit the CDC report was older and only went covered a certain age range-ending at 19 years old. But you would think at least a glip would show up.
That is my point exactly. This method (suicide by bomb) is extremely rare, to non-existant, in the USA. Many posters on this thread, and other threads, have been challenged to provide links to verified instances of suicide by bomb in a public area in America. So far, there have been none. I did impose a qualifier that the event could not include the construction, transportation, or deployment of the bomb.
This current event would be an aberration. I contend that a specialised skill, or experience, is required in order to construct, transport, deploy, and detonate a high explosive device in Norman Oklahoma. The attendant tinfoiler and paranoid comments followed.
Thick hide mandates that I will stand by my conviction and experience.