An Emirates Airbus A380. AP On Tuesday, the US Department of Homeland Security announced the introduction of an electronic-device ban for flights coming to the US from 10 airports in the Middle East and Africa.

Many of the eight affected airlines seemed to have been blindsided by the news.

With only four days to comply, it's still uncertain how many of the carriers will be able to work out the logistics of the ban.

In addition, the thought process behind the decision and the intelligence on which the ban has been based remain unclear.

Terrorist threat

According to senior administration officials, the decision to implement these security measures is a result of intelligence showing a risk for terrorist activity involving commercial aviation.

"Evaluated intelligence indicates that terrorist groups continue to target commercial aviation and are aggressively pursuing innovative methods to undertake their attacks, to include smuggling explosive devices in various consumer items," an official said on Monday.

Whatever this intelligence consists of, it was substantial enough for the national-security apparatus to act.

According to James Norton, who served as deputy assistant secretary of the DHS during the George W. Bush administration, security actions such as this will take place if there is evidence of a credible threat. An example of this happened in 2006 when the Bush administration issued an immediate ban on liquids after law enforcement in the UK foiled a terrorist plot to blow up airliners traveling across the Atlantic using liquid explosives, Norton told Business Insider.

Confusing, however, was that the UK issued a similar ban Tuesday but excluded four airports — in Dubai and Abu Dhabi in the United Arab Emirates, in Doha, Qatar, and in Casablanca, Morocco — featured in the US ban.

In addition, many in the aviation community question whether a ban of this type would even be effective in countering a terrorist attack.

Doha, Dubai, and Abu Dhabi are major international transit hubs with extensive multilayered security procedures. US-bound flights are also screened in dedicated facilities using well-trained security professionals who often have experience in law enforcement or the military.

Hamad International Airport in Doha, Qatar. Hamad International Airport In fact, Abu Dhabi International Airport is equipped with a US Customs and Border Protection preclearance facility where passengers and bags headed for the US are screened by US customs officials.

Lithium-ion batteries

The new rule is not an outright ban. Instead, it prohibits larger electronics such as laptops, cameras, and tablets from being brought into the cabin of the aircraft. This means they will most likely have to be stored inside the cargo hold of the aircraft with the checked luggage.

Such behavior, however, is explicitly prohibited by the Federal Aviation Administration.

"FAA battery fire testing has highlighted the potential risk of a catastrophic aircraft loss due to damage resulting from a lithium battery fire or explosion," the agency wrote in an alert in February. "Current cargo fire suppression systems cannot effectively control a lithium battery fire."

Administration officials told journalists on Monday that they were working with the FAA to maintain a safe flying environment, but they did not state specifics. Business Insider asked DHS for specifics on Tuesday but has not yet heard back from officials.

This is particularly concerning for Michael Mo, the cofounder and CEO of KULR Technologies, a company that specializes in thermal-management systems for batteries.

"Lithium-ion batteries are inherently volatile with an average of one out of 5 million units expected to blow," Mo told Business Insider in an interview. "It's statistics. It's not a matter of if, but a matter of when one of these things blow.

"So when that happens, it's better to have humans nearby to react and put out the fire."

Spare lithium-ion batteries stored in a cargo hold could be particularly dangerous because they would be packed into checked suitcases that would most likely also include incredibly flammable items like hairspray or deodorant.

Protectionist politics?

Of the 10 airlines affected by the US ban, three — Emirates, Etihad, and Qatar Airways — have been at the heart of a heated rivalry with the US carriers American, Delta, and United, which are not affected. For some, the inclusion of these airlines seems too convenient to be a coincidence.

"If you squint hard enough, there is some justification on a security basis for this, but the implementation has been haphazard and in manner that is particularly targeted at and does harm to the commercial interests of a set of airlines that has been the source of much competitive hand-wringing from US airlines," Airways senior business analyst Vinay Bhaskara told Business Insider.

When asked about the topic on Monday, a senior administration official denied any relationship between the electronics ban and the feud between the American and Middle Eastern airlines.

But the reasoning behind the UK's decision to exclude the Middle East's big three from its ban remains unclear, as it is believed that the UK government acted on the same intelligence as US officials.

Business impact

The immediate effect of the ban will most likely weaken the Persian Gulf's three mega-carriers along with Turkish Airlines, Bhaskara said. Based on the latest rankings from the respected consumer-aviation website Skytrax, Emirates, Qatar, Etihad, and Turkish Airlines represent the first-, second-, sixth-, and seventh-ranked carriers in the world.

Since the US government's ban calls into question the security of their home airports, these airlines will have to contend with the resulting negative publicity and uncertainty among customers.

A new Emirates ad argues that one doesn't need a laptop to have a good time aboard its flights.

A Turkish Airlines Boeing 777. Boeing But many corporate customers do not allow their employees to ship work computers in their checked luggage. This is due to concerns over theft of equipment and any sensitive information stored on the computers.

As a result, they may push some clients toward carriers that are not affected by the ban.

No US carriers offer nonstop flights into the Middle East. As a result, they won't benefit directly. The ban, however, will most likely drive lucrative business travelers back toward European hubs such as Frankfurt, London, Amsterdam, and Paris. This means US airlines will benefit through joint ventures and alliance relationships with Lufthansa, British Airways, Air France, and KLM.

That said, not all US carriers will benefit. Airlines like JetBlue and Alaska have partnership agreements with Emirates. A reduction in business for Emirates cuts into the number of passengers who depend on JetBlue's and Alaska's planes to connect them to secondary and tertiary cities in the US.

A view of Qatar Airways' business-class section. Qatar Airways According to Bhaskara, the long-term effects of the ban are unclear. The strategic decisions the affected airlines and their competitors make will be determined by how long with ban is in place.

Many of these questions will be answered, however, as airlines and the flying public work through the new guidelines.

If you're currently a business traveler affected by the US laptop ban, you can share your story with transportation@businessinsider.com.