Who is the dude with the radiation detector?
Here's a hint: http://www.thecraft.com/
Ex-Navy SEAL Working For The Craft - Private Paramilitary Forces
Youtube video appears to capture a former member of the Navy SEALs walking around the marathon post-explosion with a radiation detector. He has a military style haircut. His boots are military type desert style bates (Tactical Sport Desert Tan) commonly used in the Army and Airforce.
The radiation detector is available at Amazon for $600, or about 2 shares of Apple.
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Why it matters
Boston Police Chief Says: "There Was No Specific Threat"
Meanwhile
Why Were Bomb Sniffing Dogs At Start & Finish Lines?
Who is this guy? Looks like more Craft Paramilitary.
What Were These Guys Doing at the Boston Marathon?
What are numerous members of a private paramilitary security firm doing with their black back packs at the finish line of the Boston Marathon?
Why Were Bomb Sniffing Dogs At Start & Finish Lines?
Why It Matters - Read This
Coach Saw Bomb Sniffing Dogs, Roof Spotters, Police Drills Before Explosion
University of Mobile’s Cross Country Coach, who was near the finish line of the Boston Marathon when a series of explosions went off, said he thought it was odd there were bomb sniffing dogs at the start and finish lines.
"They kept making announcements to the participants do not worry, it's just a training exercise," Coach Ali Stevenson told Local 15. "I don't believe they were just having a training exercise. I think they must have had some sort of threat or suspicion called in."
Stevenson said he saw law enforcement spotters on the roofs at the start of the race. He's been in plenty of marathons in Chicago, D.C., Chicago, London and other major metropolitan areas but has never seen that level of security before.