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.

After a quarter century of independence, the fragmentation of Central Asia is evident to all. A senior official there might justifiably complain about how each country "[is] pursuing its own limited objectives and dissipating its meager resources in the overlapping or even conflicting endeavors of sister states." He might conclude that such a process, "carries the seeds of weakness in [the countries'] incapacity for growth and their self-perpetuating dependence on the advanced, industrial nations." One can also imagine that another Central Asian official, seeking an alternative, might propose that "we must think not only of our national interests but posit them against regional interests: That is a new way of thinking about our problems."

The latest numbers are in, and the forecast for Russia's demographic health is bleak. According to official figures released by the country's state statistics agency, Rosstat, in late May, Russia had 70,000 fewer births during the first four months of 2017 than it did a year earlier.

The diplomatic row between Qatar and seven mostly Sunni Arab countries is being called a stumbling block for U.S. efforts to promote a united front against Islamic extremism in the region. But it won't be - because it is not in any country's interest for the rift to become permanent.

To say that this has been a bad week for Qatar would be an understatement.

Over the weekend, five separate Arab states (Saudi Arabia, Yemen, Bahrain, the United Arab Emirates and Egypt) cut their ties to the Gulf kingdom, citing as causes its extensive support for Islamic extremist groups and its cozy relations with the Islamic Republic of Iran. The rupture takes the form of a cessation of air travel, a closure of borders, and a call those countries' citizens and businesses to vacate the country.

Just weeks after the President Trump's inaugural tour of the Middle East, which included significant pressure on the Arab Gulf states to build a regional security architecture to combat the Islamic State terrorist group (ISIS) and counterbalance Iran, the prospects for such a construct appear more distant than ever, at least at first glance. Over the weekend, five separate Arab states - Saudi Arabia, Yemen, the United Arab Emirates, Egypt and Bahrain - all formally severed their diplomatic ties to the Emirate of Qatar over the latter's support of Islamic extremism in various forms.

Over the past quarter-century, the Malabar naval exercises have blossomed from a relatively mundane, low-level Indo-U.S. naval drill into a robust demonstration of geopolitical force joining the Indo-Pacific's three most powerful democracies. The history and significance of Malabar, which Japan joined as a permanent participant in 2015, have received ample attention elsewhere. But let me focus this piece on the geopolitical context and significance of Australia's request to join the 2017 Malabar exercises and India's recent response.

John F. Kennedy would have turned 100 on Monday, and his life's work on foreign policy provides compelling insights into how we might approach our own challenges in an increasingly unstable world.

Can President Donald Trump broker the Israeli-Palestinian deal of a lifetime? After his trip to Israel, there is certainly cause for hope.

President Trump made clear in Sunday's Riyadh speech that America stands by countries willing to fight Islamist extremism. A welcome opportunity to revisit our relationship with two ostensible allies, Turkey and Qatar. Both host significant American military bases and Turkey is a NATO member, yet for too long they have been American partners in name while providing material support to extremist groups, including the Muslim Brotherhood and Al-Nusra front. President Trump's serious intent to confront Islamic terrorism means he must redefine the terms of our alliances with Turkey and Qatar. The United States can no longer allow them to have it both ways.

President Donald Trump is scheduled to meet with Colombian president Juan Manuel Santos at the White House on May 18. The subject of their conversation will undoubtedly have a great deal to do with the peace accord concluded last fall between the Santos government and Colombia's most notorious guerrilla group, the Revolutionary Armed Forces of Colombia (FARC).

President Donald Trump's administration is currently undertaking a review of federal programs established under the rubric of "countering violent extremism." The White House, however, should take note that it is just as important to counter nonviolent extremism. 

On Monday, Hamas, the Muslim Brotherhood offshoot that rules the Gaza Strip, thrust itself back into the international spotlight when it formally unveiled a new organizational charter. The long-discussed and much-debated document - launched with great fanfare by Hamas politburo chief Khaled Meshal at the upscale Sheraton Hotel in the Qatari capital of Doha - represents a new bid for relevance by the world's premier Palestinian Islamist movement.