On Tuesday, Mexican Marines, along with state and federal police, surrounded the municipal police headquarters in the Mexican resort city of Acapulco, charged into the building, disarmed hundreds of local police officers, and arrested two police commanders on murder charges.

The operation marked yet another bid by the administration of outgoing President Enrique Pena Nieto to tackle one of Mexico’s toughest crime problems: The complicity of local police in organized crime.

The background: Mexico’s epidemic of violent crime is getting worse. The number of homicides, which will likely top last year’s 31,000 murders, rose 17 percent in just the first eight months of this year.

Part of the crime wave can be blamed on the ability of drug gangs and other crime organizations to coopt and corrupt local cops. In many rural areas, gangs are better armed than the police, and the ultimatums they give those officers are easy to understand: “Accept cash and help us or we’ll murder you and your family.”

Pena Nieto has tried to overcome this problem by sending better-paid, better-armed federal police to root out criminal gangs where possible. The raid in Acapulco, a city with one of the world’s highest murder rates, demonstrates that even in large cities, federal forces can’t trust local police.

The politics: On December 1, Mexico will have a new president. Andres Manuel Lopez Obrador won a sizeable election victory in July on promises of dramatic political change, but his security plan was the vaguest part of his platform. His best-known pledges on that front are economic development projects designed to address the “root causes” of crime, a controversial amnesty program, and a plan to legalize some drugs.

He’s also likely to stick with Pena Nieto’s strategy of sending in troops to police the police.

The bottom line: Violent crime will be the toughest problem Mexico’s new president will face, and no matter how popular he is today, opinion polls suggest voters will hold him accountable for results.

In 2012, the United States created the Deferred Action for Childhood Arrivals (DACA) program to protect these young people from being deported. Yet just five years later, the program was rescinded, putting close to 700,000 DACA recipients at risk of being banished from the only home they've ever known. More than five dozen of these DACA recipients at risk are Microsoft employees. These young people contribute to the company and serve its customers. They help create products, secure services, and manage finances. And like so many young people across our nation, they dream of making an honest living and a real difference in the communities in which they reside. Yet they now live in uncertainty.

Microsoft has told its Dreamers that it will stand up for them along with all the nation's DACA recipients. It will represent them in court and litigate on their behalf. That's why Microsoft joined Princeton University and Princeton student Maria De La Cruz Perales Sanchez to file one of the three cases challenging the DACA rescission that was heard on Nov. 12 by the United States Supreme Court.

Read more on Microsoft On The Issues.

Last week, French President Emmanuel Macron said that NATO was experiencing "brain death," citing a lack of coordination and America's fickleness under Donald Trump as reasons to doubt the alliance's commitment to mutual defense. NATO – the North Atlantic Treaty Organization – was formed in the wake of World War II as a counterweight against Soviet dominance in Europe and beyond. Its cornerstone is that an attack on one member is considered an attack on all. But disagreement about burden sharing has gained increasing salience in recent years. In 2014, the bloc agreed that each member state would increase their own defense spending to 2% of their respective GDP over the next decade. But so far, only seven of 29 members have forked out the money. Here's a look at who pays what.

In the predawn hours of Tuesday morning, Israel launched a precision attack in the Gaza Strip, targeting and killing a Palestinian Islamic Jihad (PIJ) commander. In response, the terror group fired more than 200 rockets at southern Israel. Exchanges of fire have brought cities on both sides of the Gaza border to a standstill and at least eight Palestinians are dead and dozens of Israelis wounded. With this latest escalation, Israel now faces national security crises on multiple fronts. Here's what's going on:

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More Brexit shenanigans: Britons this week saw Prime Minister and Conservative Party leader Boris Johnson endorse Labour Party leader Jeremy Corbyn in upcoming elections. As a special bonus, they got to see Corbyn return the favo(u)r with a formal endorsement of Johnson. Most viewers in the UK will have understood immediately that these are the latest example of "deep fakes," digitally manipulated video images. The more important Brexit story this week is a pledge by Nigel Farage that his Brexit Party will not run candidates in areas held by the Conservatives in upcoming national elections. That's a boost for Johnson, because it frees his party from having to compete for support from pro-Brexit voters in those constituencies.

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80: More than 80 percent of the electronic voting systems currently used in the US are made by just three companies, according to a new report which warns that they are regulated less effectively than "colored pencils."

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