We’re covering today’s testimony in the impeachment investigation, a shooting at a high school in Southern California, and the brawl that erupted at last night’s Browns-Steelers game. | | By Chris Stanford | | Marie Yovanovitch after speaking privately to impeachment investigators in Washington last month. Anna Moneymaker/The New York Times | | Marie Yovanovitch, the former U.S. ambassador to Ukraine, is set to testify publicly today about the campaign led by Rudy Giuliani, President Trump’s personal lawyer, that led to her abrupt ouster in May. | | She will be the sole witness at a hearing of the House Intelligence Committee starting at 9 a.m. Eastern. The Times will stream her appearance live, and our reporters will provide real-time context and analysis. Here’s what to expect. | | Another angle: Also on Thursday, an official at the Office of Management and Budget appeared poised to defy orders and cooperate with the impeachment inquiry. The office played a crucial role in holding up $391 million in security aid to Ukraine. | | Students waiting to be reunited with their parents after the shooting in Santa Clarita, Calif., on Thursday. David Walter Banks for The New York Times | | Investigators were searching for a motive after the police said a 16-year-old boy pulled a pistol from his backpack and fatally shot two fellow students at Saugus High School in Santa Clarita, Calif., on Thursday. Three others were wounded. | | The suspect shot himself and was reportedly in grave condition. Thursday was his birthday, the police said. | | The details: Three off-duty law enforcement officers had just dropped off their children at the school and were effectively the first to respond. Here’s what else we know about the shooting, the gunman and the victims. | | Quotable: “Kids today, they never call, so you get this call, and you automatically wonder what it’s going to be,” said a man whose son is a sophomore at Saugus. | | A United Nations investigation into aerial bombings of hospitals in rebel areas — possible war crimes — has accumulated evidence that the Syrian government’s Russian allies were responsible for at least some. | | But the scope of the study has so far been limited to seven sites among the many targeted, according to a document seen by The Times. | | And diplomats say Moscow has been pressing the U.N. secretary general, António Guterres, not to release the conclusions. | | Times investigation: Our video team pored through witness accounts and videos, time-coded cockpit recordings of Russian pilots, plane spotter logs and security camera footage to show that one of the hospitals — an underground facility that The Times found had been bombed by Russian pilots at least once before — was bombed by the Russians again last week. | | Since 2005, a digital marketplace called Mechanical Turk has offered the chance to earn small amounts of money performing simple tasks, such as transcribing an invoice or labeling photographs. | | The internet was supposed to be a utopia. Instead, it’s … something else. | | PAID POST: A MESSAGE FROM CAMPAIGN MONITOR | Email Marketing 101: Never Sacrifice Beauty for Simplicity | A drag-and-drop email builder, a gallery of templates and turnkey designs, personalized customer journeys, and engagement segments. It's everything you need to create stunning, results-driven email campaigns in minutes. And with Campaign Monitor, you have access to it all, along with award-winning support around the clock. It's beautiful email marketing done simply. | | Learn More | | | Citizenship ruling: An American-born woman who joined the Islamic State in 2014 and says she wants to return to her family in Alabama is not a U.S. citizen, a judge ruled. | | News quiz: Did you follow the headlines this week? Test yourself. | | Modern Love: In this week’s column, a woman reflects on a forgotten shirt and the everyday challenges to a marriage. | | What we’re watching: This Vice documentary about China’s vast network of Muslim detention camps, where members of the country’s Uighur minority are forced to adopt Chinese customs. Melina Delkic, on the briefings team, calls it “a powerful look at forced assimilation.” | | Julia Gartland for The New York Times. Food Stylist: Barrett Washburne. | | Watch: The third season of “The Crown” arrives on Netflix on Sunday, introducing a new cast — including Olivia Colman as Queen Elizabeth II — to bring the royals into midlife. Read our review. | | Smarter Living: Renewable energy can’t always meet demand during peak hours. You can help by shifting some usage — setting your washing machine to run overnight, say. | | Yuri Shevchuk, a lecturer in Ukrainian at Columbia University, said Ukrainians stressed the first vowel, and pronounced it like the “i” in the word “kid.” The second vowel sounds like the “ee” sound in “keel,” and the “v” is also pronounced like the end of the word “low.” (It’s a bit hard to describe; there is an audio clip here.) | | Evening can be beautiful in the Ukrainian capital, however you pronounce its name. Lena Mucha for The New York Times | | In Russian, Kiev sounds more like “KEY-ev.” But U.S. State Department employees generally try to pronounce it the Ukrainian way — though at some points on Wednesday it sounded more like “keev,” with the long “ee” pronounced as a single syllable. | | There is also a debate over how to spell the city’s name in English. The official State Department biography of George Kent, who testified on Wednesday, spells it Kyiv, which reflects the transliteration from Ukrainian. (The Times still uses Kiev, the transliteration from Russian.) | | Dr. Shevchuk noted that, according to legend, the city was founded by a set of siblings around the sixth century and named for the eldest brother, Kyi. | | That’s it for this briefing. I’ll be away until Nov. 26, but I leave you in the capable hands of my colleague Mike Ives. | | Thank you Mark Josephson and Eleanor Stanford provided the break from the news. Karen Zraick wrote today’s Back Story. You can reach the team at briefing@nytimes.com. | | Were you sent this briefing by a friend? Sign up here to get the Morning Briefing. | | |