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Hong Kong's press has been under increased pressure despite government assurances that journalists can work unhindered after the National Security Law enacted. CNN's Kristie Lu Stout reports.

Tuesday marked the latest challenge for teachers around the U.S. who have grappled with how to address the country's reckoning with racial injustice for the past year. (April 21)

Filmmaker Sebastian Junger and CNN National Security Analyst Peter Bergen remember their friend, war photographer Tim Hetherington, 10 years after his death while covering turmoil in Libya. Watch "Full Circle" Monday, Wednesday and Friday at 6p E.T.

Arizona National Guard troops being sent to the border will focus initially on the Yuma area but could eventually expand to other areas, Gov. Doug Ducey said Wednesday. He's calling in 250 Guard members to free up law enforcement officers. (April 21)

President Joe Biden convenes a climate summit with 40 world leaders confronted by Donald Trump's legacy of climate inaction. Responding to public sentiment, many U.S. states, cities and companies have taken action into their own hands. (April 21)

Activist Greta Thunberg took a gap year from high school in 2019 to help spread awareness about climate change, and that journey is documented in her new series “Greta Thunberg: A Year to Change the World.” The three-episode docuseries will premiere on Earth Day (April 22) at 8 p.

Rev. Jesse Jackson says the guilty verdict in George Floyd's death "may have been the beginning of the end of legal lynching." A jury found ex-Minneapolis police officer Derek Chauvin guilty of murder and manslaughter in Floyd's May 2020 death.

The fatal police shooting of a Black teen seen on video charging at two people with a knife that came within minutes of the verdict in Derek Chauvin's murder trial is causing outrage over continued use of lethal force by police. (April 21)

A North Carolina deputy shot and killed a man while executing a search warrant Wednesday. (April 21)

Most of the prisoners at the Guantanamo Bay detention center have received their first dose of the COVID-19 vaccine, a day after resuming an effort to inoculate them that was halted months earlier after criticism from Congress. (April 21)

A man was fatally shot while deputies were serving a warrant in the North Carolina city of Elizabeth City. CNN's Nick Valencia has the details.

Coronavirus vaccine supply in the United States could be outstripped by demand. CNN's Nick Watt details why this may be a concern.