The US has moved to dismiss a case against two former pro-Israel lobbyists accused of conspiring to pass defence secrets to unauthorised persons.
Prosecutors had said Steve Rosen and Keith Weissman intended to disclose the details to Israel and to the media.
But the government said it was unlikely to win the case and that trial could exposed classified information.
Mr Rosen and Mr Weissman, formerly working for the influential American Israel Public Affairs Committee (Aipac), were the first lobbyists to be charged under the Espionage Act of 1917.
Acting US attorney Dana Boente said that when the charges were first filed, "the government believed it could prove this case beyond a reasonable doubt based on the statute".
But he said that after the Judge TS Ellis demanded that prosecutors proved the men intended to harm the US with their actions, there was now a "diminished likelihood the government will prevail at trial".
"don't worry about American pressure, we the Jewish people control America."
--Prime Minister Ariel Sharon. October 2001
"The Israelis control the policy in the congress and the senate."
---Senator Fullbright, Chair of Senate Foreign Relations Committee: 10/07/1973 on CBS' "Face the Nation".
"The Israeli embassy is practically dictating to the congress through influential Jewish people in the country"
-----Sec. of State John Foster Dulles quoted on p.99 of Fallen Pillars by Donald Neff