Small airports in Michigan's "thumb" are being used to smuggle drugs from Canada, and U.S. officials say they're looking for ways to fight back.

Officials cite a recent federal trial involving two men from Amherstburg, Ont., as an example of what's happening with the drug trade in the two countries.

They say a Cessna airplane touched down around midnight, dropped a load of drugs and was back in the air in 90 seconds. That's when the pilot of a U.S. Border Patrol helicopter hovering nearby turned on a powerful spotlight and tracked an SUV fleeing with hockey bags stuffed with 80 kilograms of marijuana and 400,000 Ecstasy-type pills.

U.S. officials emphasize that the bust by federal agents didn't happen on their southwestern border. It happened in rural Michigan next to a soybean field. The remote airport in Sandusky, Michigan, offers a smooth runway at any hour to anyone who needs it, a perfect landing for brazen drug smugglers who can cross the Great Lakes from Canada in minutes.

Drug smugglers target northern U.S. border

U.S. border officials say beefed-up enforcement along the Mexican border has made smuggling more challenging for criminal cartels using the major southern routes, but they say drugs continue to flow across the northern border through airstrips like Sandusky's, as officials look for new ways to fight back.

Tracking rogue planes at low altitude with their transponders off is "like trying to pick a needle out of a haystack," said John Beutlich of U.S. Customs and Border Protection, who oversees air and marine operations from the State of Washington to Maine.

Tiny airports feel helpless.

"Shoot, we're just a big cherry to pick and didn't realize it," said Joe Allen, manager of  Sandusky Airport, 145 kilometres northeast of Detroit.

Allen installed a fence to keep cars from meeting planes at the runway, but the property is not staffed at night. Instead, border agents merely posted two information signs, asking people to call a 1-800-number if they see something unusual.

U.S. wants to share Canadian radar

Homeland Security Secretary Janet Napolitano says the U.S. hopes to start tapping into the feeds from 22 Canadian radar installations to fill surveillance gaps on the border. Officials say the U.S. has one national radar network made up of feeds from the Federal Aviation Administration and the Defence Department.

Border authorities also conduct routine air patrols, but some legislators would like to see the introduction of military-grade radar along with drones that could detect small aircraft.

"All everybody wants to talk about are drug cartels coming across the southern border. I don't mean to diminish that but the northern border has gotten very little attention up until recently," said U.S. Rep. Candice Miller (R-Mich.), a senior member of the House Homeland Security Committee.

A new law requires the Obama administration to come up with an anti-drug strategy on the U.S.-Canada border by summer.

Drug seizures growing

According to U.S. statistics, Canada is a significant source of high-quality marijuana and the amphetamine Ecstasy. More than two million doses of Ecstasy were seized on the northern border in 2009 compared to just 312,000 in 2004, the Drug Enforcement Administration said, offering a snapshot of what's popular and what gets confiscated.

Most shipments come by road. But the 2009 flight from Ontario to Michigan, the subject of a recent federal trial, provided insight into drug operations that use small planes. Officials don't know how frequent such flights are but consider the border's vulnerability alarming.

Matthew Moody and nephew Jesse Rusenstrom, both from Amherstburg, Ont., were the couriers captured that night in Sandusky. Their job was to enter the country through Detroit, meet the Canadian plane and deliver the drugs to others in the U.S. They also put 27 kilograms of cocaine worth more than $500,000 on the return flight to Guelph, Ont.

It was just one in a series of shipments. Rusenstrom said he met the drug plane at least 10 times at other tiny airports in the "thumb" region — Marlette, Ray, Lapeer — as well as in Greenville in western Michigan and an airport in Pennsylvania. The pilot activated runway lights from the cockpit, a standard practice in aviation.

Rusenstrom, testifying at the trial of an accomplice, Robert (Romeo) D'Leone, said hundreds of airports were studied on Google Maps.

"We would go around looking for airports, seeing if there was fences or cameras," the 21-year-old told jurors.

D'Leone, who lives in the Toronto area, stopped his trial and pleaded guilty April 14. Rusenstrom and Moody co-operated, pleaded guilty and were recently sentenced to time served in custody. The U.S. still wants to extradite four others in Ontario who are accused of major roles, including the pilot.

Some jurors were alarmed by the revelations during the D'Leone trial.

"You always hear Homeland Security has an eye on everything. It's surprising that airfields aren't manned 24 hours," Robert Simpson, 47, told The Associated Press.

The Sandusky airport has spent $2,000 on cameras and hopes to install more.

'You can come and go as you please. You don't even have to file a flight plan.'—Joe Allen, Sandusky Airport Manager

"We're outside radar," Allen, the manager, said, running his finger over a map of Michigan's thumb. "You can come and go as you please. You don't even have to file a flight plan."

The minimal help he received from border authorities — the two information signs — had to be altered before he posted them: They referred to suspicious boats, not planes.

Beutlich, the senior Customs and Border Protection official, said his agency's routine air patrols "can't be everywhere."

"I don't think there is more than just vigilance," he said, adding that law-abiding users of small airports typically are the best sources to report trouble.