Throughout history society has determined specific rules of engagement between adversaries in armed conflict. With advances in technology, from armor to in the Middle Ages to nerve gas in World War I to weapons of mass destruction in our own time, the rules have constantly evolved. Today, when killing the enemy can seem palpably risk-free and tantamount to playing a violent video game, what constitutes warfare? What is the effect of remote combat on individual soldiers? And what are the unforeseen repercussions that could affect us all?

How can you believe all this stuff? This is the number one question Catholics get asked - and, sometimes, we ask ourselves. Why We're Catholic assembles the clearest, friendliest, most helpful answers that Trent learned to give to people. Beginning with how we can know reality and ending with our hope of eternal life, it's the perfect way to help skeptics and seekers (or Catholics who want to firm up their faith) understand the evidence that bolsters our belief - and brings us joy.

Armored cars, burner phones, top-notch weaponry, and top-secret missions - this is the life of today's private military contractor. Like author Simon Chase, many PMCs were once the world's top military operatives, and since retiring from outfits like US Navy SEAL TEAM Six and the UK's Special Boat Service, they have devoted their lives to executing missions too sensitive for the government to acknowledge. Chase reveals here for the first time the operations too hazardous and politically volatile to be officially sanctioned by his employers.

What can the call to discipleship, the adherence to the word of Jesus, mean today to the businessman, the soldier, the laborer, or the aristocrat? What did Jesus mean to say to us? What is his will for us today? Drawing on the Sermon on the Mount, Dietrich Bonhoeffer answers these timeless questions by providing a seminal reading of the dichotomy between "cheap grace" and "costly grace."

From launchpad explosions to a pernicious cricket infestation to the demanding management style of Musk himself, the rise of SpaceX was beset with challenges and far from inevitable. Find out how the startup beat the odds and flew high enough to outpace their rivals... and where they're going next.