If the definition of insanity is doing the same thing repeatedly and expecting different results, then the United Nations has gone 'round the bend.

On Monday, the U.N. Security Council unanimously passed Resolution 2375, which imposed fresh sanctions on North Korea in response to that country's September 3 nuclear test. President Trump, who had pushed for much starker sanctions, called the resolution "not a big deal."

The western Asian nation of Iran is on the cusp of expanding its reach all the way to the Mediterranean Sea and Israel's northern border - a drive that will make its nuclear pursuit, ballistic missile development and terror sponsorship that much more dangerous to the United States and its regional allies.

The old saying goes that it's not paranoia if they really are out to get you. So if you are North Korean dictator Kim Jong Un, taking extraordinary steps to ensure your personal security is not crazy, it's simply common sense.

An odd partnership is taking shape in the Middle East, where Iran and Turkey - two countries that have historically been strategic competitors - are suddenly making common cause.

President Trump's prime time address on Monday did more than simply chart a new course for America's military engagement in Afghanistan. It also marked a fresh approach to one of the most intractable problems that has confronted the United States since the start of the "war on terror": the duplicitous and dangerous role played by the nation of Pakistan.

When President Donald Trump threatened "fire and fury" in response to potential nuclear aggression from North Korea, the world held its collective breath. But a week later, the brewing calamity had abated, in large part due to the Trump administration's no-nonsense style of crisis management.

Today, the fight against the Islamic State terrorist group has become a top strategic priority of the United States and its allies in the region. In turn, the efforts of Washington and Middle Eastern partners have begun to pay real dividends, with recent months seeing a significant rollback the group's self-declared "caliphate" in Iraq and Syria. But lurking in the background of the current counterterrorism fight is another, and potentially even more significant, long-term threat.

Although it has come at enormous human and financial cost, the conflict between Russia and Ukraine that has raged in the latter's eastern territories since 2014 has helped spark a fundamental transformation of the Ukrainian military. The country now boasts the second-largest standing army in Europe (behind that of Russia), while a newfound sense of national unity - together with new training and greater readiness - has forged an increasingly capable fighting force. Nevertheless, at least one notable weak spot in Ukraine's current military posture remains.

In January 2009, Eastern Europeans were rudely reminded of a very blunt fact: If Russia wants to shut off the gas, it can.

Angered by backlogged debts, Gazprom, Russia's massive state petroleum and natural gas corporation, cut off its supply of gas to neighboring Ukraine - and, through it, to parts of the European Union. For weeks in the dead of winter, millions of Europeans were stranded without power, as Gazprom and its Ukrainian counterpart Naftogaz blamed one another for the crisis. While the flow of gas eventually resumed, European governments emerged from the experience shaken, and for good reason.

Something is stirring across the vast expanse encompassing the Caucasus and Central Asia, an area of nearly 1.6 million square miles and more than 86 million people. Throughout the region, political momentum is gathering for deeper cooperation, engagement, and coordination.

Pakistan has a long and troubled history of supporting extremists as a tool of statecraft - a policy that has, among many other things, inflamed tensions with regional rival India and roiled Islamabad's relations with Washington. Of late, however, this strategy of supporting proxies to maintain a zone of influence in the region has turned inward, with grievous consequences for the country's internal security and the cohesion of the Pakistani state itself.

Climate change has historically been a controversial topic, and former President Barack Obama was sharply criticized for addressing it during his time in office. However, the issue may be losing some of its political toxicity of late. More and more professionals and politicians on both sides of the aisle have begun speaking openly about the linkage between the environment and America's national security.

Last Friday marked the two-year anniversary of the Obama administration's signature foreign policy achievement: the 2015 nuclear deal with Iran. Formally known as the Joint Comprehensive Plan of Action, that agreement was intended as a solution to Iran's persistent nuclear ambitions, and as a vehicle to reboot the Iranian regime's relationship with the world.

If you're struggling to make sense of the latest standoff between the Chinese and Indian militaries 10,000 feet in the Himalayas, don't fret: You're in good company. The showdown at Doka La is the product of a multi-layered, multi-party dispute steeped in centuries-old treaties and ambiguous territorial claims. Only recently have sufficient details emerged to piece together a coherent picture of the crisis and we're still left with more questions than answers. However, one thing is clear: While stare-downs at the disputed China-India border are a common affair, the episode now underway is an altogether different, potentially far more dangerous, beast.

Since Russia annexed Crimea in March 2014, the Ukrainian peninsula has become something akin to a "black box," with little verifiable data on conditions available to counterbalance the official Russian narrative that all is well in the Kremlin’s newest territorial holding. Now, however, a new study has provided perhaps the most detailed look to date on the true state of political and economic play on the peninsula. Published by the Ukrainian Institute for the Future, a new but well-connected think tank based in Kiev, the report - entitled "Crimea: Three Years of Occupation" - draws on data from local sources and the analysis of seasoned specialists to paint a damning picture of the human and economic costs of Russian rule, and to make a compelling case that the Kremlin's Crimean project is a threat to Crimeans themselves, as well as to everyone else.

With America's global attention largely focused elsewhere, Iran continues to expand its military capabilities - legally and otherwise - forcing the question of what Washington and its regional allies plan to do about it.

President Donald Trump spoke Thursday in Warsaw, Poland, to an enthusiastic crowd in historic Krasinski Square. He discussed the longstanding history of the U.S./Poland relationship, and the heroism of the Polish people during the 1944 Warsaw uprising against Nazism. He also laid the groundwork for what might be an emerging Trump doctrine of U.S. and European national security.

President Trump's trip to Poland next week is an exceptional opportunity to reassert U.S. leadership and American greatness. In Warsaw Mr. Trump can reaffirm the U.S. commitment to European security by giving Ukraine the weapons it urgently needs to defend itself against Russia's continuing aggression.

The Gulf crisis over Qatar is once again catapulting Turkey into the politics of the Middle East, for which it is woefully unprepared. After a brief attempt at neutrality, Ankara threw in its lot with Doha, condemning the sanctions imposed by a Saudi-led coalition and accelerated its deployment of troops to a new base in Qatar. This decision risks upsetting President Erdogan's tenuous rapprochement with Saudi Arabia, and reflects the continued ideological prism guiding Turkish foreign policy. But it also reflects a concern with regime security. At least in part, Erdogan's embrace of Qatar reflects a belief that the same forces that supported the overthrow of Egypt's Muhammad Morsi welcomed the July 2016 failed coup in Turkey and now seek regime change in Doha. If so, Turkey's stance is unlikely to change, indicating a standoff may in the making.

The United States and Russia seem to be on a collision course in Syria, which is just fine for the regime in Damascus.

On Sunday, a U.S. Navy F/A-18E Super Hornet shot down a Syrian Su-22 fighter bomber that was conducting operations near positions held by the U.S.-backed Syrian Democratic Forces outside the besieged Islamic State stronghold of Raqqa. The shoot-down took place after repeated warnings for the Syrian aircraft to disengage, and the Coalition justified the action as being "in accordance with rules of engagement and in collective self-defense of Coalition partnered forces." The next day, a U.S. Air Force F-15E downed an Iranian-made Shahed 129 armed drone near the site of a U.S.-backed training base at al Tanf for rebels opposed to Syrian President Bashar Assad.