Meaning: The quote you provided seems to refer to the events surrounding the assassination of President John F. Kennedy in Dallas, Texas on November 22, 1963. Let's break down the quote and provide some context and information about the events it references.

The quote mentions the police finding "cartridges and rifles and the bag" in the Texas School Book Depository shortly after the assassination of President Kennedy. This refers to the discovery of evidence that linked Lee Harvey Oswald to the shooting. Lee Harvey Oswald was accused of assassinating President Kennedy from the sixth floor of the Texas School Book Depository building, where he worked at the time.

The discovery of the cartridges and rifles is a crucial part of the investigation into the assassination. The evidence found at the scene, including the rifle and the cartridges, played a significant role in shaping the official narrative of the events and in building the case against Oswald as the lone gunman.

The quote mentions that "within a half an hour, those facts were known," which suggests the speed at which the police were able to gather and disseminate information about the evidence found in the depository. This rapid dissemination of information is indicative of the chaos and urgency of the situation in the immediate aftermath of the assassination.

John Cooper, identified as a politician in the quote, may have been commenting on the speed and efficiency of the police response to the discovery of the evidence. It's possible that he was emphasizing the quick dissemination of information to the public to address the emerging questions and concerns about the assassination.

The assassination of President Kennedy was a profoundly impactful event in American history. The official investigation, led by the Warren Commission, concluded that Lee Harvey Oswald acted alone in the assassination. However, the assassination has been the subject of numerous conspiracy theories and alternative interpretations over the years.

The quote you provided reflects the immediate aftermath of the assassination and the rapid discovery and dissemination of crucial evidence. It captures a moment of urgency and the swift unfolding of events in the wake of a historic and tragic event.

The Texas School Book Depository, now known as the Dallas County Administration Building, has become a significant historical site associated with the assassination. The sixth floor of the building has been preserved as a museum, known as The Sixth Floor Museum at Dealey Plaza, which provides extensive information about the events of November 22, 1963, and the life and legacy of President Kennedy.

In conclusion, the quote you provided offers a glimpse into the immediate aftermath of the Kennedy assassination and the rapid discovery and dissemination of crucial evidence. It reflects the chaos, urgency, and significance of the events surrounding one of the most impactful moments in American history.