The Faithful Spy

l i k e m a n y o f the Arabs in Montreal, Tarik had come from France. He’d grown up just north of Paris, in Saint-Denis, one of a dozen run-down suburbs where the French government warehouses the Muslim immigrants it does not want and cannot send home. Even by the bleak standards of Saint-Denis, Tarik had a wretched childhood. His mother, Khalida, was a nurse from Algeria, his father, Charles, a French plumber whose lust for Khalida ended the day he impregnated her. When Khalida refused to have an abortion, Charles tried to beat her into a miscarriage. He failed, but the thrashing left Khalida nearly blind. She quit her job, and for the rest of her life she and Tarik subsisted on disability payments. Over the years, she grew dependent on painkillers, first to sleep, then just to get by. She died when Tarik was seventeen of a morphine overdose, officially ruled accidental. Meanwhile, the French legal system treated Charles with unsurprising leniency. He was out of prison in two years.

The neighborhood kids cut Tarik no slack for his mother’s miserable fate. Quite the contrary. Though he had never met his father, they scorned him as French. He was not helped by the fact that he was small and preferred reading to playing soccer. The nurse and the plumber had produced a brilliant child, his aptitude for science obvious from kindergarten. The French educational bureaucracy took note. As a teenager Tarik attended the Lycée Louis-le-Grand, among the top high schools in France, where he excelled in physics and biology. But the better Tarik’s grades, the deeper his misery. The rich white students at Louis-le-Grand didn’t bother to hide their disdain for the poor Arab in their midst. Meanwhile, the kids in Saint-Denis scorned him as a sellout, calling him “the brain” and “the little prince” and ripping up his homework. His lowest moment came on his fourteenth birthday. No one, not even his mother, bothered to remember. A week later, Tarik found himself signing up for an Arabic class at a Muslim community center a few blocks from his apartment. To his surprise, everyone at the center encouraged him. Within a few months he was attending a local mosque every morning. Then another mosque, this one more radical. And he found that everywhere he went the believers accepted his prayers. For the first time in his life he belonged.

By the time Khalida died, Tarik had devoted his body and soul to Islam. He hated his father and France and the West for what they had done to his mother, and his mother for what she had done to him. He wanted more than anything to travel to Afghanistan and join the jihad. But the imams wouldn’t let him go. He should keep studying, they said.

They had enough fighters. They needed scientists. ta r i k d i d as they asked. He took an undergraduate degree in molecular biology from the University of Paris, then left France for Canada. Now he was working toward a Ph.D. in microbiology from McGill, in downtown Montreal. His advisers considered him diligent, though privately they acknowledged that his second year had been less promising than his first. It happened. Not everyone could make the jump to a graduate-level program. And. perhaps Tarik’s professors in France had inflated his potential, since Arabs were badly underrepresented in the sciences. But the McGill professors were wrong. Tarik was every bit as smart as his scores had indicated. Unfortunately, he couldn’t devote his full attention to their labs. In the basement of the anonymous gray house, he had his own project.

plague.

To nonscientists, the word conjures up visions of the end of days, illness and death beyond measure. But for biologists, the word has a more specific meaning: Yersinia pestis, the scientific name for the germ that causes the disease called plague, or sometimes the Black Death. During the Middle Ages plague was the most feared of diseases, more terrifying even than smallpox. In the mid-1300s, tens of millions of Europeans, a third of the continent’s population, died after being bitten by plague-infested fleas.

“The condition of the people was pitiable to behold,” one Italian wrote, recalling the devastation. “Many died in the open street, others in their houses, their deaths known only by the stench of their rotting bodies.” Another epidemic began in China in the 1890s and ran for a generation, killing twelve million people. Since then plague has largely disappeared in Europe and the United States, thanks to better sanitation and aggressive efforts to exterminate rats and fleas. But the Y. pestis germ remains widespread in the wild, infecting thousands of people every year. Exotic viruses like Ebola get most of the media’s attention, but plague has killed far more people.