Bill Chappell

Millions of Americans are currently under stay-at-home orders, part of a wider effort to curb the spread of the coronavirus that causes COVID-19, causing international air travel to plummet. But within the U.S., thousands of domestic passenger flights are still taking off each day.

A look at U.S. air traffic finds thousands of planes in the air – a sight that could be jarring to anyone practicing social distancing, or living under stay-at-home orders that have now been issued in more than 10 states.

The USNS Comfort, one of the Navy's hospital ships that has often been called on to deliver humanitarian aid, has arrived in New York City to help ease the strain of the COVID-19 pandemic. The ship entered New York Harbor on Monday morning, passing the Statue of Liberty on its way to Pier 88 in Manhattan.

The Summer Olympics that had been scheduled to begin in Tokyo this July will instead take place almost exactly one year later, the International Olympic Committee says. The games were postponed last week due to the COVID-19 pandemic.

"The Olympic Games Tokyo 2020 will be celebrated from 23 July to 8 August 2021," the IOC said Monday. It added that the Paralympic Games will follow, running from Aug. 24 to Sept. 5.

U.K. Prime Minister Boris Johnson has tested positive for the coronavirus that causes COVID-19, he announced Friday. In a video announcement, Johnson said he has "mild symptoms" of COVID-19, including a fever and "a persistent cough."

Johnson is the first world leader found to be infected with the coronavirus. German Chancellor Angela Merkel is under self-quarantine after her doctor tested positive for the virus. She has undergone two tests that yielded negative results; a third test is scheduled for early next week.

"We are at war with a virus that threatens to tear us apart," World Health Organization Director-General Tedros Adhanom Ghebreyesus told world leaders Thursday, in a special virtual summit on the COVID-19 pandemic.

The deadly coronavirus, Tedros said, "is the defining health crisis of our time."

The Navajo Nation reported its first two coronavirus cases on March 17. Just over a week later, there are now 69 cases. The reservation is under stay-at-home orders — but thousands of people must regularly leave their houses for necessities such as water.

The Sheetz convenience store chain is giving hourly pay raises of $3 to roughly 17,000 workers in its stores, the company announced Wednesday in response to the coronavirus crisis. It's one of the most aggressive moves yet by companies that are boosting pay to retain, attract and motivate employees.

The widescale raise is retroactive to March 13 and will be in effect through April 23.

Spain is now reporting more than 3,400 COVID-19 deaths, making it the second European country with a death toll higher than in China, where the new coronavirus was first detected in late 2019.

Italy is reporting 7,503 deaths from the viral respiratory disease — the most in the world, and more than double the 3,285 deaths reported in China.

Prince Charles has tested positive for the coronavirus that causes COVID-19 and is now in isolation, according to a statement issued by Clarence House, the prince's royal residence in London. The prince and his wife Camilla, Duchess of Cornwall, 72, are currently living at Balmoral Castle, the royal family's estate in Scotland.

"The statement said the 71-year-old prince of Wales is displaying mild symptoms but 'remains in good health,' " NPR's Frank Langfitt reports from London. He adds that Camilla, 72, has tested negative for the virus.

The rate of new coronavirus cases in New York is "doubling about every three days" and is speeding up even more, Gov. Andrew Cuomo said Tuesday. "That is a dramatic increase in the rate of infection."

The new estimates are "troubling and astronomical numbers," the governor said. He added that the apex of the curve of rising coronavirus cases in New York is still 14 to 21 days away, according to the latest projections. The governor also said New York is in urgent need of ventilators and other vital resources.

China's Hubei province is preparing to emerge from a two-month lockdown that was prompted by tens of thousands of COVID-19 cases. In recent days, the province and its capital city, Wuhan, have reported a dwindling number of new coronavirus cases.

Updated at 6:13 p.m. ET

The Tokyo Summer Olympics will not begin in late July and instead will be held "by the summer of 2021," Japanese Prime Minister Shinzo Abe announced Tuesday. The delay comes after an increasing number of athletes and sporting federations called for the games to be delayed because of the COVID-19 pandemic.

It is the first time an Olympics has been postponed, though the games were canceled three times, because of World War I and World War II.

With the coronavirus outbreak blowing past the 300,000-case mark, WHO Director-General Tedros Adhanom Ghebreyesus says world leaders and health officials won't be able to defeat COVID-19 if they rely only on defensive measures such as social distancing and requiring people to stay at home.

The coronavirus has now spread to nearly every country on the planet, the head of the World Health Organization said.

New York state has confirmed 20,875 cases of the coronavirus — a jump of 5,700 cases that Gov. Andrew Cuomo says is because of his state's aggressive approach to testing. New York can now conduct more than 16,000 tests a day, the governor said.

As he announced those sobering numbers, Cuomo reiterated that New York, the U.S. epicenter of the COVID-19 pandemic, needs to sharply increase hospitals' capacity to treat patients. The governor escalated that call Monday, saying his office is issuing an emergency order to require all hospitals in the state to increase their capacity.