Friday on the NewsHour, Iran vows to expand its missile production despite possible new U.S. sanctions. Also: What civilians who remain in the Syrian city of Aleppo face, Mark Shields and Michael Gerson on a year of political news and the National Book Award winner for fiction.

Former President Bill Clinton made his first solo appearances on the campaign trail in New Hampshire to support his wife Hillary's 2016 campaign. Amy Walter of The Cook Political Report and Tamara Keith of NPR join Judy Woodruff to discuss the strategy behind Donald Trump’s first television ad, plus Gov. Chris Christie’s pitch to New Hampshire voters.

Tuesday on the NewsHour, President Obama makes an emotional appeal for background checks and outlines other actions to curb gun violence. Also: A view from Tehran over tensions with Saudi Arabia, New Hampshire grapples with a heroin epidemic, a historic graduation for young Afghan women and MacArthur grant winner LaToya Ruby Frazier documents her struggling hometown.

Wednesday on the NewsHour, North Korea claims it has successfully tested a hydrogen bomb. Also: Why Americans are buying more and bigger cars, efforts to cap sky-high interest rates, a look at life in Mexico after deportation and using cardboard to help children with disabilities.

Thursday on the NewsHour, China's market makes a great fall, routing stocks around the world. Also: How the 2016 election is playing out in advertisements, new guidelines for how to eat, getting happiness by giving to others, the lifelong consequences of segregated schools, a new true crime documentary raises questions about the justice system and how a graphic journalist uses art to tell stories.

Friday on the NewsHour, the last jobs report of 2015 shows signs of sustained growth in the U.S. economy despite global turmoil. Also: Mexican drug lord El Chapo recaptured, sexual assault stoke tensions over migrants in Germany, rising interest in personal health technology and David Brooks and David Corn analyze the week's news.

Monday on the NewsHour, with weeks to go until the Iowa Caucuses, the race between Democrats Hillary Clinton and Sen. Bernie Sanders tightens. Also: A campaign to bridge the partisan divide, the legacy of David Bowie, the Supreme Court considers mandatory union dues, the ethics of interviewing.

Tuesday on the NewsHour, President Obama prepares to set the tone for his final year in office with his last State of the Union address. Also: A deadly suicide bombing rips through Istanbul, the UN delivers aid to a besieged Syrian city, college graduates help first-generation students with applications, a former convict finds poetry and a new life and why the Internet may not be bad for you.

Wednesday on the NewsHour, 10 U.S. sailors are released after their boats were seized for entering Iranian waters. Also, President Obama uses his State of the Union address to critique the 2016 race, a former NRA chief talks gun policy, Germany’s migrant stance draws local backlash, the St. Louis Rams prepare to return to Los Angeles and architecture’s highest award goes to Alejandro Aravena.

Thursday on the NewsHour, Islamic State militants claimed responsibility for a terror attack that killed seven in Jakarta. Also, the story beyond the tragic image of a dead Syrian refugee that went viral, the White House’s vow to end cancer in America, the Academy Awards struggle with diversity, older women may have more trouble finding jobs and a photographer looks at how his passion has evolved.

Friday on the NewsHour, Chinese market struggles and plummeting oil prices lead to big losses on Wall Street. Also: Donald Trump and Ted Cruz dominate the Republican debate, Shields and Brooks discuss the 2016 presidential race, Silicon Valley tries to fix its diversity problem and Civil War trauma meets medical drama in the PBS miniseries “Mercy Street.”

Monday on the NewsHour, sanctions are lifted and prisoners are freed in what could be a new era of relations with Iran. Also: Democratic presidential candidates meet up for their final debate before voting, a massive natural gas leak displaces families in California and the words of Martin Luther King Jr.

Tuesday on the NewsHour, the Supreme Court will hear the case against President Obama’s executive action allowing 4 million undocumented immigrants to stay in the U.S. Also: U.S. Envoy Brett McGurk reflects on the prisoner exchange with Iran, China’s economy grows at its slowest rate in decades, an author explores the autism spectrum and a new nursing program is boosting kids’ brainpower.

Wednesday on the NewsHour, a water crisis in Flint, Michigan, has the governor on the defensive and residents outraged. Also: A warning for pregnant women about the Zika virus, rethinking what’s important on the college application, reporters on the campaign trail to go beyond the polls in Iowa and New Hampshire, telling the story of autism and a tribute young photographer killed in Burkina Faso.

Thursday on the NewsHour, a British inquiry concludes that Russian President Vladimir Putin likely approved the killing of Alexander Litvinenko. Also: Sen. Rand Paul shares his secret to winning Iowa, the Buffalo Bills hire the NFL’s first female coach, an author examines the ingredients for genius, dangers for women on the refugee trail and TV ads that make smokers want to quit.

Friday on the NewsHour, Washington joined other parts of the East Coast in declaring a state of emergency ahead of a massive snowstorm. Also: Presidential candidates sharpen their attacks as voting draws closer, Brooks and Marcus discuss the week in politics, a possible new ninth planet, schools add Wi-Fi to busses, a debate over the growing feral cat crisis and why the world needs a Muslim jedi.

Monday on the NewsHour, a look at recovery efforts as the East Coast digs out from a deadly blizzard. Also: The race for caucus support as the Iowa contest nears, Egypt five years after a political uprising, gold wars in Washington state, calls for accountability in the Flint water crisis, ancient sculptures once thought lost forever and a girl changing minds on the football team.

Tuesday on the NewsHour, President Obama announces plans to ban solitary confinement for youth in federal prisons. Also: Campaigning intensifies as Iowa draws near, how presidential candidates tap into fear, high school vocational training as an alternative to college, the government battles postpartum depression, Mozart reaches 260 years and a student challenges stereotypes with dance.

Wednesday on the NewsHour, a confrontation between law enforcement and an anti-government militia in Oregon ends with arrests and one death. Also: Donald Trump opts out of the next debate, Kenya’s war against poachers, Google develops the latest in A.I. technology, a freed reporter works to reclaim his life, D.C. plans a WWI memorial and one student stands out as the only female welder.

Thursday on the NewsHour, the World Health Organization considers issuing an emergency over the fast-spreading Zika virus. Also: An American freed from Iranian prison describes his ordeal, a Republican debate without Trump, how ethanol may fuel Iowa voters, why the U.S. economy’s best days may be over, remembering the Challenger disaster, why radio will never die and two girls who love to build.

Friday on the NewsHour, days before the Iowa caucus, Democratic candidates fight for Iowa women voters. Also: Sen. Ted Cruz plays defense in the latest GOP debate, Brooks and Dionne talk the week in politics, Barbie gets a makeover, prescription drug shortages force doctors to make tough decisions, a Danish dance troupe stands up for refugees and a female JROTC officer takes command.

Monday on the NewsHour, it’s caucus night in Iowa. We preview the nation’s first voting contest with a look at Evangelicals' role in shaking out a crowded GOP field, Amy Walter and Tamara Keith update what's happening on the ground, David Brooks and Michelle Cottle analyze the state of the race, plus a fight over core conservative principles.

Tuesday on the NewsHour, after Cruz and Clinton claim victory in Iowa, candidates shift their focus to New Hampshire. Also: What’s at stake going into the next round of primaries, the Islamic State’s expansion in Libya, San Francisco police face review after a fatal shooting, Oklahoma leads the nation in preschool education and lost photographs illuminate black history.

Wednesday on the NewsHour, Democratic candidates debate liberal credentials while Republicans brawl over victory margins. Also: How to fight the Zika virus, Sweden suffers vigilante violence over refugees, Yahoo faces financial struggles, a three-parent DNA treatment raises debate, big data meets modern medicine and how women are changing the way America works.

Thursday on the NewsHour, candidates double down on attacks as the New Hampshire primary approaches. Also: Colombia’s president asks for U.S. aid to help FARC peace efforts, new Syrian hostilities threaten diplomatic talks, the controversy over online daily fantasy sports, a brand new natural wonder, the search for life’s meaning in the face of death and the role of fearlessness in black art.