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Model rockets can get by with only simple passive stability (i.e. keeping the CG in front of the CP). While this is potentially true with High Power rockets, it is a waste of a vehicle’s potential to simply let it wander wherever it will while burning off those thousands of Newton-seconds of impulse. A straight, vertical flight is essential for obtaining maximum altitude, a goal not just for the rocketeer’s bragging rights but sometimes required when flying scientific payloads. Vertical trajectory systems (a term coined by Dave Ketchledge, see The Next Shuttle and Rocket Science) are a class of active guidance systems whose job it is to keep a rocket going completely vertical regardless ...
Designed for use by investigators in any agency, large or small, Practical Cold Case Homicide Investigations Procedural Manual provides an overview of the means and methods by which previously reported and investigated yet unresolved homicides might be solved. Written by an experienced cold case investigator and consultant, this convenient handbook
The period between 2001 and 2006 saw the rise and fall of an internationally supported effort to bring a protracted violent conflict in Sri Lanka to a peaceful resolution. A ceasefire agreement, signed in February 2002, was followed by six rounds of peace talks, but growing political violence, disagreements over core issues and a fragmentation of the constituencies of the key parties led to an eventual breakdown. In the wake of the failed peace process a new government pursued a highly effective ‘war for peace’ leading to the military defeat of the LTTE on the battlefields of the north east in May 2009. This book brings together a unique range of perspectives on this problematic and ulti...
“a worthy, if not definitive, addition to the body of Zodiac knowledge.” — Kirkus "It is no exaggeration to call the identity of the Zodiac Killer the most maddening unsolved crime in American history...But it is also no exaggeration to say that Mike Rodelli's case stands above them all" — Tom Zoellner, Author and Former Reporter for the San Francisco Chronicle In June 1999, Mike Rodelli had an idea that had never occurred to a generation of detectives in the San Francisco Bay Area. This led him to a new suspect in the Zodiac case and began a twenty-year odyssey to prove that this man was the Zodiac Killer. In the Shadow of Mt. Diablo: The Shocking True Identity of the Zodiac Killer is filled with original information about the mystery, including DNA and behavioral profiling that resulted directly from his twenty years of intensive research. Rodelli provides the reader with an objectively researched, fully documented book that is meticulously footnoted, and which shows that, against all odds, he has solved a case many said would never yield its dark secrets.
In 1954, two college students were hiking along a creek outside of Boulder, Colorado, when they stumbled upon the body of a murdered young woman. Who was this woman? What had happened to her? The initial investigation turned up nothing, and the girl was buried in a local cemetery with a gravestone that read, "Jane Doe, April 1954, Age About 20 Years." Decades later, historian Silvia Pettem formed a partnership with law enforcement and forensic experts and set in motion the events that led to Jane Doe's exhumation and eventual identification, as well as the identity of her probable killer. The 2023 paperback edition includes an epilogue with updated information on how the mystery finally was solved.
Mum and my older sisters, Margaret, Janet, Lesley and their dog Prince, were in their home when the Germans dropped incendiary bombs onto their top floor flat in Dalton Street, West Norwood, London, which was situated over a hardware shop that stored huge tanks of paraffin oil! Mum and Marg tried desperately to extinguish the fires but had to give up and flee in case the flames reached the tanks below. Unfortunately, Prince went back looking for Dad who was on duty with the ambulance service at the time, so not there and died in the blaze. They all made their way to a nearby large warehouse opposite Dalton Street. It belonged to H Day and Son a removal company and furniture store for that ni...
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Baker has sacrificed to protect America at all costs. Fighting a battle she didn’t start. For a country that no longer cares. To save humanity, you must kill or be killed. Rated as a top political and medical thriller author by BestThrillers - Packard delivers again in this newest thriller! Baker's dedication to safeguarding America faces its ultimate test as fundamental freedoms teeter and artificial intelligence reshapes destinies. With corrupt forces threatening existence, she must expose them before time runs out. Can she prioritize the greater good over personal survival? Join her pulse-pounding journey as she confronts insurmountable odds, unveiling the climax of an epic struggle for justice. Will she defy the odds or make the ultimate sacrifice?