Two new reports issued this week by Amnesty International and Human Rights Watch detailed dozens of civilian deaths caused by drone strikes in Pakistan and Yemen. Classified documents obtained by the Washington Post suggest that CIA officials who carry out the strikes make little effort to track civilian deaths.

“There is a lot more pressure building” on President Barack Obama, Sarah Holewinski, head of the Center for Civilians in Conflict, a group pushing for greater transparency in drone strikes, told me this week. “He’s going to have to look at these legal questions.”

Documents leaked by whistleblower Edward J. Snowden emerged this week, revealing NSA phone monitoring of German Chancellor Angela Merkel, 35 unidentified heads of state, and 70 million calls in France.

The extent of the surveillance is sparking widespread indignation and endangering joint counter-terrorism operations among Germany, France and the United States.

“The perception here is of a United States where security has trumped liberty,” New York Times columnist Roger Cohen wrote from Berlin on Thursday, “intelligence agencies run amok (vacuuming up data of friend and foe alike), and the once-admired ‘checks and balances’ built into American governance and studied by European schoolchildren have become, at best, secret reviews of secret activities where opposing arguments get no hearing.”

There is a serious terrorist threat to the United States. The administration is under enormous pressure to prevent attacks. But there are ways to safeguard the United States without sparking such a serious backlash abroad and at home.

Holewinski called on the Obama administration to implement its promise to move command of drone operations from the CIA to the American military. She said the shift, which Obama announced this spring, is going “very, very slowly.”

Military control is one step toward a key goal: greater transparency in countries where drone strikes are enormously unpopular. Keeping the drone strikes as a covert CIA-run program makes accountability and determining the true number of civilian deaths impossible, she said.

If strikes are commanded by the military and disclosed publicly, reports of civilian casualties could be investigated under military law and compensation paid to victims — as now happens in Afghanistan.

Holewinski also urged the administration to disclose targeting rules that it has refused to make public. How are civilians defined? And how are civilian casualties assessed? What is the legal definition of an individual who can be targeted?

She credited the administration for a decrease in drone strikes since Obama promised one in May. But, she insisted, the targeting process needs to be far more transparent.

Inside the United States, meanwhile, press reports emerged on Monday that the Transportation Security Administration is expanding its prescreening of airline passengers to include government and private databases that contain employment information, property records and physical characteristics.