Author and scientist Neil deGrasse Tyson returns to the San Francisco Chronicle, to meet with host John McMurtrie, book editor of The Chronicle. They talk about Tyson's new book "Accessory to War: The Unspoken Alliance Between Astrophysics and the Military," which covers the interactions between science and military going back thousands of years. 

Produced and introduced by Peter Hartlaub. Music is Mozart's Symphony 40 in G Minor by Blue Dot Sessions

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