None of these nations is helping the Institute for Science and International Security (ISIS) ("Employing science in the pursuit of international peace.") figure out what Syria had built on the banks of the Euphrates River.
A commercial satellite took a picture of something in Syria, back in 2003. It's the same facility that, at last report, Syria says was a big, unused, warehouse (see "Satellite Images of Syrian Reactor / Warehouse").
ISIS published a paper online (*.pdf format, 5 pages), "SUSPECT REACTOR CONSTRUCTION SITE IN EASTERN SYRIA: THE SITE OF THE SEPTEMBER 6 ISRAELI RAID?." It's a pretty good collection of available information about the Syrian site, including what kind of reactor it could be, based on similarities to a North Korean reactor building.
One of the bits of information is the size of the Syrian "warehouse," compared to a North Korean reactor building:
|47 x 47 meters
|24 x 32 meters
|North Korean Reactor
|48 x 50 meters/td>
|32 x 24 meters
That coincidence in size is no proof, of course. In fact, the ISIS paper says the images "raise as many questions as they answer."
David Albright, president of ISIS, seems frustrated at the refusal of America, Israel, and Syria, to give him all the information he needs to figure out what Syria built on the banks of the Euphrates.
I can understand Albright's frustration. I can also understand the reticence of these governments.
There's a war on. There will be secrets. Some things will be kept secret because lives depend on the other side staying ignorant. Some secrets will be kept to avoid embarrassing influential people.
I don't know what sort of secret the information about that square building is. My guess is that Israel and America don't want to tell any more than they have to about exactly what they knew - and know - about the "warehouse." And Syria isn't likely to admit that it's got a nuclear program: not even other Middle Eastern nations would be likely to take kindly to that idea.
As for the American government giving ISIS all the information it wants, the research organization says that "Throughout its history, ISIS has maintained a commitment to the wide dissemination of its major findings." That's a noble principle, but in times of war, "wide dissemination" of information can have unhappy consequences.