At least one local law enforcement agency in the United States uses drones to protect against such threat to call a terrorist group to target the United States rail line.
The police chief of the Mass-Transit system in Philadelphia-area said that for some time he knew that more than 140,000 miles of rail lines crossed the US border and "thinks it was a time to use the drone to monitor the company's track".
After the latest article of Al-Qaeda's English-language publication, he started the drone program, step-by-step instructions for creating "Home Designer Diesel Tool" and claimed that the railway is in America's "simple goals".
"This time we can fear and impose strict security in trains with their air transport system."
Al Qaeda has learned ABC News from the Federal Transportation Security Administration to send security notification to law enforcement agencies across the country.
Among these threats, Thomas Nassel, head of the Pennsylvania Transit Authority Police in SouthUnion, ABC News' said David Curley, "drones" is a great way to trace our abilities not to walk on the track. "
"Using the drone can cover the area very quickly".
"When it was high for a little while around my head ... and when the article comes, I pulled the trigger, I said" let's do "," the navy said "
Transit-agency drones, which are equipped with a high-resolution camera, can detect intruders or flaws in the tracks in the offices and help provide information that authorities may stop before reaching the problem area.
John Cohen, former anti-terrorism coordinator of the Homeland Security Department and an ABC News contributor, said, "Al Qaeda and ISIS are very interested and their followers are urging the attacks on the railway infrastructure of our nation."
Cohen said, "Protecting the railway infrastructure is an incredible challenge, there are literally thousands of miles of roads, railway stations open to the public, it is very difficult."
Train terrorists are not new targets In Madrid, hundreds of people have been killed in Madrid in London against trains in Madrid, London.
The threat of rail attacks hit even near home
On September 11, 2011, the US Navy Seal Team killed leader of al Qaeda leader Osama bin Laden on the occasion of the 10th anniversary of terrorist attacks. (Rail attack never happened.)
In 2009, the 25-year-old Afghan National Resident was arrested in Colorado for Manhattan's subway system bombings.
And in 2012, a planned conspiracy was a New York-passenger train in Canada, a secret US agent failed to conceal.
Still, Cohen said, "To send a warning to law enforcement, TSA says that we are concerned about this threat, you need to be concerned about this threat," Cohen said.
Cohen told the terrorist magazine, "It is important to know that they released a magazine and advised their followers." "Because we are already thinking about the defeat of the attack."