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Former NASA astronaut Ron Garan looks ahead to the future of space exploration as NASA and SpaceX prepare to launch their next crew to the International Space Station. (April 22)

As a nurse, Kari Wegg knew what it meant when doctors told her she would have to be put on a ventilator. Nine months after contracting COVID-19, the Indiana woman is battle-scarred, but defiant. (April 22)

On this Earth Day, Georgia Tech is announcing that its Kendeda Building has won certification as the 28th “living building” worldwide. After a year of operation, the building meets the standard of doing more good for the environment than harm.

British mom Rebecca Roberts shares her story of giving birth to twins she conceived three weeks apart, a rare condition called superfetation. CNN's Elizabeth Cohen has the details.

Spanish police have descended on an illegal workshop that was using 3D printers to produce guns for a suspected far-right group. Pictures released on Sunday showed officers in Tenerife in the Canary Islands carrying out the joint operation with the Treasury Office.

Washington (AFP) – US President Joe Biden announces that the US has hit 200 million vaccine shots in his first 92 days in office and that all Americans aged 16 and above will be eligible for a vaccine as of Monday.

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.