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Travelers look at posters placed by Hong Kong protesters at the airport on Wednesday. Photo: Vincent Thian/AP

While President Donald Trump suggested a meeting with Chinese leader Xi Jingping over the Hong Kong crisis, China called the protests "close to terrorism" as normal operations began to resume at the international airport, the BBC reports.

What's new: The Airport Authority said late Wednesday that any application to protest in the terminal must be made in advance with a "Letter of No Objection" to be obtained from police, as security was heightened in the area, per Reuters. CNN notes that nearly 1,000 flights were canceled this week over the massive protests at the airport, which saw riot police clash with activists. More protests are planned for Friday, Reuters notes.

These atrocities, which are lawless, trampling on human rights and inhumane, have completely gone beyond the bottom line of civil society, and is no different to terrorist."
— Statement by China’s Liaison Office in Hong Kong

Catch up quick: Protests at the airport escalated Monday when thousands of demonstrators packed the main terminal and transport exits Monday, per Reuters. On Tuesday, thousands defied threats from China and Hong Kong's leader Carrie Lam and packed the departure area and blocked security gates for a 5th consecutive day of airport protests.

  • Pepper-spray carrying riot police then entered the airport for the first time since the protests began and clashes erupted, according to the Washington Post. Clashes ensued into the night.
  • Paramilitary police were assembling across the border in Shenzhen — a move some see as a threat to protesters, per AP. Trump tweeted earlier Tuesday that U.S. intelligence had told him of the move, saying "Everyone should be calm and safe!"
  • Lam told a news conference that the city was on "the brink of no return." She said "lawbreaking activities in the name of freedom" were damaging the rule of law and warned protesters were pushing Hong Kong to "an abyss."
  • The Hong Kong leader defended police amid brutality claims. Law enforcement admitted earlier that some officers posed as protesters during unrest on Sunday, according to the BBC.
A tweet previously embedded here has been deleted or was tweeted from an account that has been suspended or deleted.

Why it matters: The chaos at the airport marks a massive disruption to the Chinese-controlled territory's economy since protests started in June. The airport directly and indirectly contributes to about 5% of Hong Kong's gross domestic product, per Bloomberg.

The big picture: Hong Kong International Airport is one of the busiest in the world, with about 1,100 flights daily across nearly 200 destinations.

  • Police said they had detained 5 people over Tuesday's clashes, bringing the total number of arrests to more than 600 since protests began in June, according to Reuters.

What they're saying: Activists including Joshua Wong, the pro-democracy protest leader who became a symbol of Hong Kong's 2014 Umbrella Movement, apologized for the disruptions they had caused at the airport.

A tweet previously embedded here has been deleted or was tweeted from an account that has been suspended or deleted.

Go deeper: Hong Kong protests assert the freedoms China seeks to constrain

Editor's note: This article has been updated with more details on the demonstrations, airport developments and Lam's comments.

Go deeper

At least 3 dead after Amtrak train derails in Montana

Photo: Jacob Cordeiro/Twitter

An Amtrak train derailed near Joplin, Montana, resulting in at least three deaths and multiple injuries on Saturday, per a Liberty County Sheriff's Office statement to media outlets.

The big picture: Some 147 passengers and 13 crew were aboard the Empire Builder train, which runs from Seattle to Chicago, when seven cars derailed about 4p.m., Amtrak spokesperson Kimberly Woods said in an emailed statement.

Updated 19 mins ago - Politics & Policy

Federal judge blocks vaccine mandate for NYC teachers

Students are dismissed from the first day of school at PS 133 in Brooklyn on Sept. 13. Photo: Michael Nagle/Xinhua via Getty Images

A federal appeals court is set to hear a challenge Wednesday to a vaccine mandate planned for New York City school employees.

Why it matters The vaccine mandate was set to begin on Monday, prompting concerns over staffing shortages in schools across the nation's largest school system. But a judge on Friday temporarily blocked the measure, per AP.

New York prepares for staff shortages from health vaccine mandate

New York Gov. Kathy Hochul during a news conference Tuesday in New York City.. Photo: Mark Kauzlarich/Bloomberg via Getty Images

Gov. Kathy Hochul (D) announced Saturday she would declare a state of emergency if there were health worker shortages due to New York's upcoming COVID-19 vaccine mandate.

Why it matters: Hochul moved to reassure concerns of staffing shortages in the health care sector in a statement that also outlined plans to call in medically trained National Guard members, workers from outside New York and retirees if necessary when the mandate takes effect Monday.