AP 
FILE - This Jan. 31, 2010 file photo  shows an unmanned U.S. 
Predator drone flies over 
Kandahar Air Field,  southern 
Afghanistan, on a moon-lit night. After a decade of costly  
conflict in Iraq and Afghanistan, the American way of war is evolving  toward less brawn, more guile. 
Drone aircraft spy on and attack  terrorists with no pilot in harm's way. Small teams of special  operations troops quietly train and advise foreign forces. Viruses sent  from computers to foreign networks strike silently, with no American  fingerprint.  (AP Photo/Kirsty Wigglesworth, File)
Supporters  of Pakistani religious party 
Jamiat Ulema-e-Islam, burn a  representation of a 
US flag during a rally condemning US drone strikes  in tribal areas and the reopening of the NATO supply line to neighboring  Afghanistan, in Hyderabad, Pakistan, Friday, June 15, 2012. (AP  Photo/Pervez Masih)

FILE  - In this Sept. 7, 2011 file photo, John Brennan, Assistant to the  President for Homeland Security and Counterterrorism, speaks in  Washington. After a decade of costly conflict in Iraq and Afghanistan,  the American way of war is evolving toward less brawn, more guile. Drone  aircraft spy on and attack terrorists with no pilot in harm's way.  Small teams of special operations troops quietly train and advise  foreign forces. Viruses sent from computers to foreign networks strike  silently, with no American fingerprint. (AP Photo/Susan Walsh, File)             — AP           
 WASHINGTON
 WASHINGTON —   After a decade of costly conflict in Iraq and Afghanistan, the American way of war is evolving toward less brawn, more guile. 
        Chart shows the number of air attacks in Pakistan             — AP 
Drone aircraft spy on and attack terrorists with no pilot in harm's  way. Small teams of special operations troops quietly train and advise  foreign forces. Viruses sent from computers to foreign networks strike  silently, with no American fingerprint. 
        
It's war in the shadows, with the U.S. public largely in the dark. 
In Pakistan, armed drones, not U.S. ground troops or B-52 bombers, are  hunting down al-Qaida terrorists, and a CIA-run raid of 
Osama bin  Laden's hide-out was executed by a stealthy team of Navy SEALs. 
In Yemen, drones and several dozen U.S. military advisers are trying to  help the government tip the balance against an al-Qaida offshoot that  harbors hopes of one day attacking the U.S. homeland. 
In Somalia, the Horn of Africa country that has not had a fully  functioning government since 1991, 
President Barack Obama secretly has  authorized two drone strikes and two commando raids against terrorists. 
In Iran, surveillance drones have kept an eye on nuclear activities  while a computer attack reportedly has infected its nuclear enrichment  facilities with a virus, possibly delaying the day when the U.S. or  Israel might feel compelled to drop real bombs on Iran and risk a wider  war in the Middle East. 
The high-tech warfare allows Obama to target what the administration  sees as the greatest threats to U.S. security, without the cost and  liabilities of sending a swarm of ground troops to capture territory;  some of them almost certainly would come home maimed or dead. 
But it also raises questions about accountability and the implications  for international norms regarding the use of force outside of  traditional armed conflict. The White House took an incremental step  Friday toward greater openness about the basic dimensions of its shadowy  wars by telling Congress for the first time that the U.S. military has  been launching lethal attacks on terrorist targets in Somalia and Yemen.  It did not mention drones, and its admission did not apply to CIA  operations. 
"Congressional oversight of these operations appears to be cursory and  insufficient," said Steven Aftergood, an expert on government secrecy  issues for the Federation of American Scientists, a private group. 
"It is Congress' responsibility to declare war under the Constitution,  but instead it appears to have adopted a largely passive role while the  executive takes the initiative in war fighting," Aftergood said in an  interview. 
That's partly because lawmakers relinquished their authority by passing  a law just after the Sept. 11 terrorist attacks that essentially  granted the White House open-ended authority for armed action against  al-Qaida. 
Secret wars are not new. 
For decades, the CIA has carried out covert operations abroad at the  president's direction and with congressional notice. It armed the  mujahedeen in Afghanistan who fought Soviet occupiers in the 1980s, for  example. In recent years the U.S. military's secretive commando units  have operated more widely, even in countries where the U.S. is not at  war, and that's blurred the lines between the intelligence and military  spheres. 
In this shroud of secrecy, leaks to the news media of classified  details about certain covert operations have led to charges that the  White House orchestrated the revelations to bolster Obama's national  security credentials and thereby improve his re-election chances. The  White House has denied the accusations. 
The leaks exposed details of U.S. computer virus attacks on Iran's  nuclear program, the foiling of an al-Qaida bomb plot targeting U.S.  aircraft, and other secret operations. 
Two U.S. attorneys are heading separate FBI investigations into leaks  of national security information, and Congress is conducting its own  probe. 
It's not just the news media that has pressed the administration for information about its shadowy wars. 
Some in Congress, particularly those lawmakers most skeptical of the  need for U.S. foreign interventions, are objecting to the  administration's drone wars. They are demanding a fuller explanation of  how, for example, drone strikes are authorized and executed in cases in  which the identity of the targeted terrorist is not confirmed. 
"Our drone campaigns already have virtually no transparency,  accountability or oversight," Rep. Dennis Kucinich, D-Ohio, and 25 other  mostly anti-war members of Congress wrote Obama on Tuesday. 
A few dozen lawmakers are briefed on the CIA's covert action and  clandestine military activity, and some may ask to review drone strike  video and be granted access to after-action reports on strikes and other  clandestine actions. But until two months ago, the administration had  not formally confirmed in public its use of armed drones. 
In an April speech in Washington, Obama's counterterrorism chief, John  Brennan, acknowledged that despite presidential assurances of a  judicious use of force against terrorists, some still question the  legality of drone strikes. 
"So let me say it as simply as I can: Yes, in full accordance with the  law - and in order to prevent terrorist attacks on the United States and  to save American lives - the United States government conducts targeted  strikes against specific al-Qaida terrorists, sometimes using remotely  piloted aircraft, often referred to publicly as drones," he said. 
President George W. Bush authorized drone strikes in Pakistan and  elsewhere, but Obama has vastly increased the numbers. According to Bill  Roggio of The Long War Journal, an online publication that tracks U.S.  counterterrorism operations, the U.S. under Obama has carried out an  estimated 254 drone strikes in Pakistan alone. That compares with 47  strikes during the Bush administration. 
In at least one case the target was an American. Anwar al-Awlaki, an  al-Qaida leader, was killed in a U.S. drone strike in Yemen in  September. 
According to a White House list released late last year, U.S.  counterterrorism operations have removed more than 30 terrorist leaders  around the globe. They include al-Qaida in East Africa "planner" Saleh  Ali Saleh Nabhan, who was killed in a helicopter strike in Somalia. 
The drone campaign is highly unpopular overseas. 
A Pew Research Center survey on the U.S. image abroad found that in 17  of 21 countries surveyed, more than half of the people disapproved of  U.S. drone attacks targeting extremist leaders in such places as  Pakistan, Yemen and Somalia. In the U.S., 62 percent approved of the  drone campaign, making American public opinion the clear exception. 
The U.S. use of cyberweapons, like viruses that sabotage computer  networks or other high-tech tools that can invade computers and steal  data, is even more closely shielded by official secrecy and, arguably,  less well understood. 
Sen. John McCain, R-Ariz., has been a leading critic of the  administration's handling of information about using computers as a tool  of war. 
"I think that cyberattacks are one of the greatest threats that we  face," McCain said in a recent interview, "and we have a very divided  and not very well-informed Congress addressing it." 
Defense Secretary Leon Panetta and national security officials often  talk publicly about improving U.S. defenses against cyberattack, not  only on U.S. government computer systems but also against defense  contractors and other private networks linked, for example, to the U.S.  financial system or electrical grid. Left largely unexplained is the  U.S. capacity to use computer viruses and other cyberweapons against  foreign targets. 
In the view of some, the White House has cut Congress out of the loop, even in the realm of overt warfare. 
Sen. James Webb, D-Va., who saw combat in Vietnam as a Marine,  introduced legislation last month that would require that the president  seek congressional approval before committing U.S. forces in civil  conflicts, such as last year's armed intervention in Libya, in which  there is no imminent security threat to the U.S. 
"Year by year, skirmish by skirmish, the role of the Congress in  determining where the U.S. military would operate, and when the awesome  power of our weapon systems would be unleashed has diminished," Webb  said. 
  By ROBERT BURNS, LOLITA C. BALDOR and KIMBERLY DOZIER, Associated Press
Online: Pew Research Center:  
  www.pewresearch.org The Associated Press