The Obama administration is reversing an 18-year ban on news coverage of the return of American war dead, allowing photographs of flag-covered caskets when families of the fallen troops agree, Defense Secretary Robert Gates said Thursday.

"My conclusion was we should not presume to make the decision for the families," Gates said in announcing results of a quick review of a ban that had stood through Republican and Democratic administrations.

Although details are being worked out, the new policy will give families a choice of whether to admit the press to ceremonies at Dover Air Force Base in Delaware, the entry point to the United States for the caskets of overseas war dead.

It's a decision that's likely to resonate in Canada, where a similar policy exists -- albeit with one significant difference.

While the Gates decision Thursday reversed an outright ban imposed in 1991 by President George H.W. Bush, Canada's policy was a compromise position after grieving families complained about Prime Minister Stephen Harper's attempt to follow Bush's lead.

Harper's Tories tried to ban coverage of repatriation ceremonies in April 2006, just as Canada was preparing to receive the bodies of four Canadian soldiers killed in what was, at the time, the worst single-day loss of troops in combat since the Korean War.

It was only after family members voiced their dissatisfaction with the policy that Ottawa relented and allowed coverage of the ceremonies when agreed to by grieving relatives.

U.S. President Barack Obama asked for a re-examination of the Pentagon blanket ban and supports the decision to change it, White House press secretary Robert Gibbs said.

"I have always believed that the decision as to how to honor our fallen heroes should be left up to the families," Vice President Joe Biden said. "The past practice didn't account for a family's wishes and I believed that was wrong."

Some Democrats and liberal groups are among critics claiming the government was trying to hide the human cost of war by preventing modern versions of an iconic image from long-ago wars: a line of flag-wrapped coffins coming home.

"We should honor, not hide, flag-draped coffins," said Sen. Frank Lautenberg, D-N.J. "They are a symbol of the respect, honor and dignity that our fallen heroes deserve."

Lautenberg had written Obama this month asking him to consider lifting the ban put in place by President George H.W. Bush in 1991, at the time of the Gulf War.

From the start, the ban has been cast as a way to shield grieving families.

Advocates for U.S. veterans and military families are split on the issue; some say they want the world to honor fallen troops or see the price of defending the country.

"There has never been a greater disconnect between those who serve in harm's way and those back home," said Paul Rieckhoff, executive director of Iraq and Afghanistan Veterans of America. "All too often, the sacrifices of our military are hidden from view."

But John Ellsworth, who lost a son in Iraq in 2004, said photographs of the coffins could be used as anti-war propaganda. "It's pretty obvious that the Pentagon did not discuss this with us," said Ellsworth, president of Military Families United.

He said lifting the ban was arbitrary and poorly thought out. His organization asked, for example, what would happen if different members of the same family disagree on news coverage.

Gates said he is setting up a team to address such questions. It is not clear when the new policy will be fully in effect.

Gates is the only member of Bush's cabinet who asked to stay in his job under the new Democratic administration. Gates said he was "never comfortable" with the media ban and had looked at lifting it more than a year ago, under the old administration.

Gates said that at the time, he deferred to advisers inside the Pentagon who argued that the prospect of media coverage could be an onus on vulnerable families.

"I was much happier with the answer I got this year," Gates said.

Gates said there remains a division of opinion inside the Pentagon about whether the ban is appropriate. But he dismissed as "ancient history" a question about whether the ban originated as a public relations strategy.

As of Wednesday, at least 4,251 members of the U.S. military had died in the Iraq war since it began in March 2003, according to an Associated Press count.

As of Tuesday, at least 584 members of the U.S. military had died in Afghanistan, Pakistan and Uzbekistan as a result of the U.S. invasion of Afghanistan in late 2001, according to the Defense Department.

By contrast, some 108 Canadian soldiers have died as part of Canada's mission in Afghanistan, which began in late 2001 but became a much deadlier, combat-oriented operation when soldiers were re-deployed to volatile Kandahar province in 2006.

Under pressure from open-government advocates, the Pentagon in 2005 released hundreds of the military's own images of flag-draped coffins from the two ongoing wars, previous wars and from military accidents. The photographs were released in response to a Freedom of Information request and lawsuit.