Sen. Bob Corker accused the Obama administration of hiding what really happened in the attack on the U.S. consulate.

FBI agents tasked with investigating the attack on the U.S. consulate in Benghazi have still not arrived in the city or secured the crime scene, according to a report from CNN.

CNN reported that the FBI was in Tripoli, but had not been given permission to go to Benghazi, where U.S. Ambassador to Libya Chris Stevens and three other Americans were killed two weeks ago.

"The senior law enforcement official I spoke to said, 'If we get there now, it's not clear that it will be of any use to us,' " said Fran Townsend, a CNN national security analyst.

Sen. John McCain and other Republicans have criticized the administration for saying the attack evolved from a protest.

Your morning global affairs speed-read

Israeli Prime Minister Benjamin Netanyahu will use his address at the United Nations today to warn Iran — and the world — that Israel will not tolerate Iran acquiring the means to produce a nuclear weapon. The remarks will be aimed at much at the Israeli public and the world community as at the Obama administration and Democrats, who have taken Netanyahu to task for inserting himself in the U.S. presidential race. Read The Hill's preview here.

Ahead of his speech, the Israeli foreign ministry released a report showing sanctions against Iran are working, undermining some of Netanyahu's arguments. [Associated Press]

The U.N. General Assembly will also hear from Palestinian leader Mahmoud Abbas, who is expected to once again ask the world body to recognize Palestine as a state after the peace process with Israel stalled.

The Israeli prime minister has become a major figure in the Obama-Romney presidential contest. 

Sen. Johnny Isakson (R-Ga.) will use his ceremonial appointment to the United Nations to urge rejection of a proposed arms trade treaty, he said Wednesday.

“It's an opportunity for me to follow up on some issues I've addressed with [U.S.] Ambassador [Susan] Rice in the U.N. and some issues I have with the U.N.,” Isakson told The Hill in a phone interview from his home state. “So it gives you a chance to at least speak on behalf of the people you represent and on behalf of the country.

“Of what's going on in the U.N. right now, to the rank-and-file American citizen, the arms trade treaty agreement is probably the paramount issue. The message should be strong that we disagree with any U.N. resolution that might infringe upon the Constitution of the United States and the rights that are granted to our people in the Bill of Rights. I think that would be the consensus of the country.”

The United States is beefing up its counterterrorism presence in northern Africa to deal with the Islamist threat in Mali and the surrounding region, Secretary of State Hillary Clinton said Wednesday.

“The United States is stepping up our counterterrorism efforts across the Maghreb and Sahel, and we’re working with the Libyan government and other partners to find those responsible for the attack on our diplomatic post in Benghazi and bring them to justice,” Clinton said. 

“But we are also expanding our counterterrorism partnerships to help countries meet their own growing threats.”

The lawmakers said they were "disturbed" by administration accounts suggesting the attack grew out of a protest.

The U.S. delegation left the floor before the Iranian leader delivered a tirade against America and Israel.