The base in Niger marks the opening of another far-flung U.S. military front against al-Qaida and its affiliates, adding to drone combat missions in Afghanistan, Yemen and Somalia. The CIA is also conducting drone airstrikes against al-Qaida targets in Pakistan and Yemen.
Senior U.S. officials have said for months that they would not put U.S. military "boots on the ground" in Mali, an impoverished nation that has been mired chaos since March, when a U.S.-trained Malian army captain took power in a coup. But U.S. troops are becoming increasingly involved in the conflict from the skies and the rear echelons, where they are supporting French and African forces seeking to stabilize the region.
Obama did not explicitly reveal the drone base in his letter to Congress, but he said the U.S. troops in Niger would "provide support for intelligence collection" and share the intelligence with French forces in Mali.
A U.S. defense official, speaking on condition of anonymity to provide details about military operations, said the 40 troops who arrived in Niger Wednesday were almost all Air Force personnel and that their mission was to support drone flights.
The official said drone flights were "imminent," but declined to say whether unarmed, unmanned Predator aircraft had already arrived in Niger or how many would be deployed there.
The drones will be based at first in the capital, Niamey. But military officials would like to move them eventually north to the city of Agadez, which is closer to parts of Mali where al-Qaida cells have taken root.
"That's a better location for the mission, but it's not feasible at this point," the official said, describing Agadez as a frontier city "with logistical challenges."
The introduction of Predators to Niger fills a gap in U.S. military capabilities over the Sahara, most of which remains beyond the reach of its drone bases in East Africa and southern Europe.
The Pentagon also operates drones from a permanent base in Djibouti, on the Horn of Africa, and from a civilian airport in Ethiopia.
The U.S. military has been flying small turboprop surveillance planes over northern Mali and West Africa for years, but the PC-12 spy aircraft have limited range and lack the sophisticated sensors that Predators carry.
U.S. military contractors have been flying PC-12 surveillance aircraft from Agadez for several months. Those planes do not carry military markings and only require a handful of people to operate.
In contrast, Predators need ground crews to launch, recover and maintain the drones. Those crews, in turn, require armed personnel for protection.
The U.S. defense official said it is likely that more U.S. troops will deploy to Niger, but declined to be specific. "I think it's safe to say the number will probably grow."
The Predators in Niger will only conduct surveillance, not airstrikes, the official said. "This is purely an intelligence gathering mission," he said. Other officials said the Obama administration had not ruled out arming the Predators with missiles in the future.
Information collected from reconnaissance missions will be shared with the French and other African militaries so they can attack al-Qaida targets, officials said.
There is evidence that al-Qaida fighters in West Africa are already bracing for drone warfare. The Associated Press reported finding an al-Qaida document in Timbuktu, Mali, that listed 22 tips for avoiding drones. Among other countermeasures, it advised hiding "under thick trees" and buying off-the-shelf electronic scramblers "to confuse the frequencies used to control the drone."
Niger, one of the poorest countries in the world, signed an agreement with the United States last month that provides legal safeguards for U.S. forces stationed there. Nigerien officials are concerned about the spillover of violence and refugees from Mali, which have threatened to destabilize the entire region.
Because Mali's coup leaders toppled a democratically elected government, the U.S. government is prohibited by law from giving direct military aid to Mali.
Johnnie Carson, the State Department's top diplomat for Africa, told reporters Friday that security assistance and other aid could "immediately" resume to Mali "if there is a restoration of democracy." Mali has tentatively scheduled elections for July.
The French military launched a surprise intervention in Mali last month after Islamist fighters swept south and threatened to take over much of the country.
Since then, about 4,000 French troops and a coalition of about 6,000 African forces have retaken major cities in northern Mali, chasing al-Qaida fighters and other militants into remote areas. One French offficial described combat operations there as "a little like Afghanistan."
French military leaders have said they would begin a partial withdrawal next month. Their strategy hinges on enlisting Malian troops and other African forces to act as peacekeepers, while negotiating side deals to persuade some of Mali's many militant factions to turn against al-Qaida.
Al-Qaida fighters and other Islamist guerrillas, however, have quickly adopted guerrilla tactics and show no sign of disappearing. Car bombs and suicide attacks have flared in recent days and will likely intensify in the coming weeks, Carson acknowledged.
"There's no question that [al-Qaida] has not been totally defeated but they have been significantly degraded," he said at a breakfast sponsored by the Center for Media and Security.
More Nation & World Headlines
Cop indicted for murder in traffic-stop shooting Will ‘Happy Birthday’ song be free to use soon? Debris linked to missing Malaysian 777 Export-Import Bank excluded from highway bill 777 departs Aleutians after emergency landing House approves highway funding bill Taliban leader Mullah Omar dead, Afghans say Administration wants to give prisoners access to Pell grants
Our new comment system is not supported in IE 7. Please upgrade your browser here.