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Astronauts aboard the International Space Station send their New Year's greetings from space as they ring in 2018 in 16 different time zones.

Iranian President Hassan Rouhani addressed the country Sunday night after several days of anti-government protests that have rocked the nation. Deadly anti-government protests rock Iran

President Donald Trump warned Sunday that the United States is watching Iran's treatment of protesters for human rights violations after anti-government protests there turned deadly this weekend. White House voices its support for anti-government protesters

In a matter of days, protests in Iran have quickly spread across the country, taking the government by surprise and leaving analysts and pundits alike confused. Part of the reason many have been caught off guard is because these protests appear quite different from their 2009 predecessor -- in terms of size, leadership and objective. Opinion: These Iran protests are different

Ten US citizens and two crew members from Costa Rica have died in a New Year's Eve plane crash in Costa Rica.

Throngs of revelers packed cities around the globe to usher in 2018 with public celebrations and fireworks, despite fears of terrorism and frigid weather in some places. Revelers around the globe ring in 2018 amid heightened security

From Hong Kong to Auckland to Seoul, South Korea, people began to ring in 2018 with impressive fireworks displays around the world.

From Australia to the Vatican, here's a look at New Year's celebrations around the world.

In his New Year message, UN Secretary-General António Guterres called for global unity to overcome growing challenges and said, "I am issuing an alert -- a red alert for our world."

The Red Cross has set up a tent where women can get help if they feel unsafe on the Eberstrasse, just south of the Brandenberg Gate, the focal point of New Year's festivities in Berlin. Journalist Chris Burns has the details.

A woman without her headscarf waves a white shawl in what appears to be part of a social media campaign protesting an Iranian law that requires women to wear hijabs.

When it's 5 a.m. ET on December 31, people in Samoa have already shot off their fireworks. Follow the New Year around the world

CNN's Nic Robertson reports that Iranian protesters are calling for the overthrow of Supreme Leader Ayatollah Khamenei. Several people have reportedly been shot during the protests.

The largest public display of discontent in Iran since the 2009 Green Movement has brought about a series of tweets from US President Donald Trump, pushback from the Iranian government and a scene that might have been unfathomable a decade ago -- protesters challenging the rule of Supreme Leader Ayatollah Khamenei. What's at play in Iranian protests?

Reports that shots have been fired in Iran's anti-government protests are trickling out onto social media.

The White House has urged Iran to respect the rights of Iranians who have taken to the streets to protest over the past two days, warning that "the world is watching." Trump warns Iran the 'world is watching' protests

Russian President Vladimir Putin called for Russia and the US to engage in "pragmatic cooperation" in his New Year greetings to US President Donald Trump. Putin urges 'pragmatic' US-Russia cooperation

Anti-government protests have spread into several cities in Iran and President Trump is vocally supporting the protesters.

Watch second place Commanche take the line honours in the 2017 Sydney Hobart race.

President Trump tweeted about the recent protest in Iran and said the "Iranian govt should respect their people's rights". CNN's George Howell reports.

US officials tell CNN that North Korea may be moving towards a ballistic missile test sometime after New Years. Recent moving of equipment indicates a possible missile test rather than a satellite launch, at least at this time.

Famous for its huge, intricate ice sculptures, the Harbin International Snow and Ice Festival in China is now underway. CNN's Amara Walker reports.

Let's try and make this the best year in... at least a year. 18 things to look forward to in 2018

South Korea says the vessel transferred oil to a North Korean ship, violating UN sanctions. CNN's Alexandra Field reports.

China's bike sharing frenzy is a bubble

The health ministry says at least nine people have been killed and several were wounded in an attack on a Coptic church in Cairo. CNN's Salma Abdelaziz reports.

South Korea has seized a Hong Kong-registered ship that allegedly transferred oil to a North Korean vessel in violation of United Nations sanctions. S. Korea seizes ship it says gave oil to North Korea

President Donald Trump said Thursday that he is "very disappointed" in China for allegedly selling oil to North Korea, tweeting that the on-again, off-again Trump ally was "caught red handed" allowing oil to be imported by the rogue regime. Trump accuses China of allowing oil into North Korea

A senior administration official told CNN that the Trump administration is planning to be "more quiet" and "more discreet" about speaking publicly on US military exercises with the Republic of Korea and Japan aimed at demonstrating military capability against North Korea. US aims to be 'more discreet' about military exercises related to North Korea

The UN Security Council unanimously adopted a new set of draconian US-drafted sanctions on North Korea that will further strangle its energy supplies and tighten restrictions on smuggling and the use of North Korean workers overseas. North Korea insults Trump after sanctions

At least 12 people, including a child, were killed in a fire Thursday night at a five-story apartment building in the New City borough of the Bronx.

Take a look at 20 photos of the week from December 22 through December 29.

Russia has accused the United States of violating an arms control treaty by agreeing to supply anti-missile systems to Japan.

A loyal follower of Kim Jong Un, party member Mun Gang Sun decorates her home with photographs of North Korean leaders, and her son even has a miniature military uniform.

From the humanitarian crisis in Yemen to the controversial election in Venezuela, here are the 7 stories that dominated international news in 2017.

Two teens from different countries create a bond at a camp for children who've lost a family member to terrorism.

Japanese police have arrested a couple whose daughter froze to death in a small chamber.

A suicide bomb attack on a Shia cultural center in Afghanistan left 41 people dead and dozens injured. CNN's Arwa Damon reports.

The world's most expensive house, Chateau Louis XIV, is located in Paris and valued at $300 million. CNN's Jim Bittermann reports.

They have been killed, recruited to fight, used as human shields, forced into marriage and enslaved. 2017 has been a "nightmare year" for children caught in the crosshairs of conflict, the UN's agency for children has said. 2017 a 'nightmare year' for children in conflict

CNN's Arwa Damon joins Turkish police to raid a suspected ISIS cell in Istanbul.

Surrounded by looms and anti-US propaganda, 8,000 people work inside this huge textile factory in Pyongyang.

CNN's Nima Elbagir went undercover to witness a human slave auction in Libya. Her report ignited protests around the world and international condemnation about slavery.

See CNN's Fast Facts for a look at the life of the late Pope John Paul II. He was canonized as a saint on April 27, 2014. Pope John Paul II Fast Facts

International Committee of the Red Cross spokesperson Anastasia Isyuk tells CNN's Hala Gorani that medical evacuations of critically ill people from Syria's besieged Eastern Ghouta have begun.

Chess tournaments, for better or worse, don't usually command international headlines. Not so for the World Chess Championships in Riyadh, Saudi Arabia this week. Chess tournament in Saudi Arabia under fire from Israeli, female players

The top global stock markets of 2017

Prince Harry was asked about the guest list for his May wedding to Meghan Markle, after his interview with the former US president aired on BBC Radio 4.

Read CNN's Fast Facts about Christmas, a popular Christian holiday celebrating the birth of Jesus Christ.

In a BBC interview conducted by Britain's Prince Harry, former President Barack Obama warned that the internet risked reinforcing people's prejudices and leading to a fractured society.