President Donald Trump played White House tour guide on Wednesday, showing off the helipad he is building on the lawn before leaning over to autograph a piece of it and bragging about the ballroom he's rushing to complete despite legal challenges.

Trump gushed for several uninterrupted minutes about granite being laid and said the chopper landing area would leave visiting foreign leaders "very impressed" — including Chinese President Xi Jinping, who is coming next month.

Millions more people may be able to get smaller, lightweight Amazon packages delivered by drones by the end of the year under a plan the company announced Wednesday to expand the airborne shipping to suburban areas in nearly 500 U.S. cities.

Customers could receive the drone deliveries in as fast as 30 minutes, Amazon said in a news release. The drones can carry packages up to 5 pounds.

The Ebola outbreak in Congo has reached 5,000 cases, government data showed Wednesday, as responders warn it is spreading at an unprecedented speed outpacing efforts to slow it in one of the country's remotest regions.

Data from Congo's Ministry of Health showed the outbreak had so far recorded 5,021 cases, including 2,378 deaths as of Sunday, as it rages in some of the most challenging conditions imaginable fueled by insecurity, displacement and intense population movements.

A telescope has spied the fastest known star in our galaxy, racing around the supermassive black hole at the center of the Milky Way.

The star is zipping around the black hole, reaching speeds of about 15,534 miles per second (25,000 kilometers per second). That's 100,000 times faster than a commercial plane.

Colombia's President Abelardo de la Espriella has asked his ally U.S. President Donald Trump to suspend tariffs to help the South American nation recover from a powerful earthquake that killed at least 289 people.

De la Espriella took office earlier this month just days before the 7.4 magnitude quake struck. He was backed by Trump in Colombia's closely contested presidential election, which was decided in a runoff on June 21, and has sought to emphasize his connections with the U.S. leader.

A former engineering director at Meta who has testified before Congress about child safety on Instagram told jurors Wednesday at a landmark trial that the company took a "don't ask, don't tell" approach on kids under 13 on its platforms.

During his second day of testimony, Arturo Béjar said Meta consistently prioritized profits over safety in designing its products, focusing on how often and for how long people used them, even if it was detrimental to their mental well-being.

The national debt surpassed a record $40 trillion on Wednesday, a staggering milestone as defense costs, social programs like Social Security and Medicare and interest on the burgeoning deficit make up an enormous share of federal spending.

The milestone figure was recorded just five months after the U.S. hit a record $39 trillion debt in March. It reached $38 trillion five months before that, in October.

Canada and the United States moved closer Wednesday to finalizing a trade agreement that would avert threatened 50% U.S. tariffs, with a senior Canadian official calling the emerging terms "a very good deal for Canada" while cautioning that negotiations were not complete.

President Donald Trump said the agreement was "very fair" to both sides and predicted U.S. farmers and manufacturers would benefit. The tariffs on about $20 billion worth of Canadian imports have been postponed until 12:01 a.m. Saturday.

Prince Harry and his wife, Meghan, will return to the United Kingdom, seemingly marking the end to a yearslong rift between them and the royal family.

The Daily Telegraph reported the couple won't resume their roles as working members of the royal family, but returning to Britain means King Charles III, who is being treated for an undisclosed form of cancer, will get to spend more time with his grandchildren.

A Russian missile barrage overnight Thursday killed at least 12 people in Kyiv as explosions echoed across Ukraine's capital throughout the night, local authorities said.

At least 33 people were wounded, according to Ukraine's Emergency Service. The air raid alert remained active into the early morning hours Thursday.