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Expand chart
Data: The Drone Databook; Map: Andrew Witherspoon/Axios

About half of the world's militaries are now flying drones, according to a sweeping new study published this week that revealed the swift spread of a critical technology that until recently was too expensive or sophisticated for most countries.

Why it matters: The increasingly robot-crowded skies mean that clashes involving drones — like the recent attack on a Saudi oil facility that the U.S. has blamed on Iran — are likely to become commonplace.

The takeaways: From cheap, off-the-shelf quadcopters to enormous, missile-toting aircraft, flying drones are not only proliferating widely, but they're becoming integrated increasingly deeply into militaries, according to the new report from Dan Gettinger, co-founder of the Center for the Study of the Drone at Bard College.

  • They are already changing the way countries project power over adversaries. Chinese drones are flying over the South and East China seas, Russian drones are over Ukraine, and Iranian drones allegedly operate in Yemen and Syria.
  • Despite the explosion of new players, the U.S., China and Israel still have the most sophisticated drone operations, Gettinger tells Axios. But new leaders, like Turkey and Russia, are emerging.
  • China has fewer experiences operating drones than its peers — but, as one of the largest suppliers of drones to other countries, it's likely learning vicariously, Gettinger says.

Between the lines: The study's focus on training and R&D programs in addition to drone arsenals reveals some militaries' deeper preparations for drone warfare.

  • South Korea, for example, has about as many drones as you'd expect for a country its size, according to the report. But a look at its training programs shows something different: Its military intends to train thousands of small-drone operators.
  • "South Korea recognizes that small drones are going to become ubiquitous on the battlefield of the future," Gettinger says.

What's next: Big R&D efforts are underway in several countries to develop drone swarms — groupings of drones that can be flown by one remote operator, or even autonomously.

Go deeper

50 mins ago - World

Brazil senators vote to recommend criminal charges for Bolsonaro

Brazilian senators vote on probe into President Bolsonaro's handling of pandemic. Photo: Gustavo Minas/Bloomberg via Getty Images

A Brazilian Senate committee Tuesday voted to approve a report recommending President Jair Bolsonaro be charged with a raft of criminal indictments, including crimes against humanity over his response to the COVID-19 pandemic, per AP.

Why it matters: Bolsonaro has become the face of a right-wing approach to the pandemic that includes repudiating vaccines and masks and resisting lockdowns and other mitigation measures. The Senate report holds him personally responsible for half of the country's 600,000 deaths.

Former Georgetown tennis coach pleads guilty to accepting admissions bribes

Gordon Ernst (left) former head tennis coach at Georgetown, outside a courthouse in Boston in 2019. Photo: Jessica Rinaldi/The Boston Globe via Getty Images

A former Georgetown University head tennis coach has pleaded guilty Tuesday to bribery charges related to facilitating the admission of prospective applicants.

Why it matters: Gordon Ernst solicited and accepted bribes from William Singer, ringleader of the cheating scheme uncovered by Operation Varsity Blues, and families in exchange for helping prospective applicants get into Georgetown as student athletes, according to the Justice Department.

4 hours ago - Health

CDC says some immunocompromised people can get fourth COVID shot

Photo: Noriko Hayashi/Bloomberg via Getty Images

The Centers for Disease Control and Prevention said in updated guidelines Tuesday that some immunocompromised people who have received either Pfizer or Moderna's COVID-19 vaccines will be able to get a fourth shot.

Details: People over 18 who are "moderately to severely immunocompromised" and have received three doses of an mRNA vaccine may get a fourth shot (of either the Pfizer, Moderna, or Johnson & Johnson vaccines) at least six months after getting their third Pfizer or Moderna dose, per the CDC.