U.S. Secretary of State Antony Blinken was asked about the announcement from Israeli Prime Minister Benjamin Netanyahu's office's announcement overnight that additional crossings into Gaza would be opened up for aid to enter.

He said the U.S. "welcomed" the development but that "the real test is results, and that's what we're looking to see in the coming days, the coming weeks."

"Is the aid effectively reaching the people who need it throughout Gaza?" he said. "Do we have a much better system for deconfliction and coordination so that the humanitarian workers, the folks who are delivering the aid, can do it safely and securely? All of these things are critical."

Blinken said these aims would be measured by clear metrics "like the number of trucks that are actually getting in on a sustained basis," and the aid making it to those in need through the enclave — "including critically northern Gaza."

He said the administration would be closely watching to see if other measurements were reversed, including "the fact that almost 100% of the population is acutely food insecure" as well as indicators of potential famine.

"So really, the proof is in the results," he said.

ABC News' Shannon Crawford

The partner of one of the seven World Central Kitchen aid workers killed in an Israeli air strike in Gaza this week is pleading for answers into the deadly attack.

"We need some answers," Sandy Leclerc, the partner of Jacob Flickinger, a dual U.S.-Canadian citizen, told ABC News on Thursday in her first television interview since the attack. "We need the truth of what happened because this situation is so unclear."

"Please Mr. Biden, give us the truth of what happened," she asked of President Joe Biden as she spoke with ABC News correspondent Phil Lipof.

Israel has decided to open another border crossing point -- the Erez checkpoint -- to allow humanitarian aid to cross into Gaza, according to an Israeli official.

The decision comes after Israeli Prime Minister Benjamin Netanyahu and U.S. President Joe Biden spoke by phone earlier Thursday.

"This increased aid will prevent a humanitarian crisis and is necessary to ensure the continuation of the fighting and to achieve the goals of the war," the official said in a statement. "In light of this, Israel will allow the temporary delivery of humanitarian aid through Ashdod (port) and the Erez checkpoint and will increase the Jordanian aid coming in through Kerem Shalom."

-ABC News' Dana Savir

The U.S. military's emergency pier system to get humanitarian aid into Gaza is still en route, Pentagon spokesperson Maj. Gen. Pat Ryder told reporters Thursday.

Ryder said that USAID continues to work with organizations to finalize a distribution plan for the aid once it's transferred by the system -- known as JLOTS -- to shore. He also acknowledged that the deadly Israeli strike that killed seven humanitarian aid workers this week "certainly doesn't make that job easier."

He added that it "has not deterred us from continuing to work with groups and NGOs to come up with solutions."

Ryder confirmed that Israel has committed to providing security on shore for the pier and port system.

"I know Israel's investigating in terms of the strike on World Central Kitchen and we trust that Israel will provide the security that we need on the shore," he said.

Ryder said the system is expected to be operational by the end of April or early May.

"We're not changing the mission. We've been tasked to provide a temporary pier. Everything is on track on schedule at this point," he said.

-ABC News' Luis Martinez

Israel on Saturday demonstrated its "military superiority" against Iran while also showcasing its partnership with military allies, including the United States, John Kirby, spokesperson for the White House National Security Council, said Monday.

Israel said Sunday about 99% of the missiles and drones launched by Iran were intercepted by Israel and its allies, a defense that Kirby called a "tremendous success."

"I think it did show, did demonstrate that Iran is not the power that it purports to be, that it doesn't have that same military superiority," Kirby said on "Good Morning America."

Israeli Prime Minister Benjamin Netanyahu is expected on Monday to reconvene his war cabinet, a body that met on Sunday without deciding on a response to Iran's attack. And President Joe Biden and his G7 counterparts on Sunday released a statement urging Iran to cease its attacks.

"With its actions, Iran has further stepped toward the destabilization of the region and risks provoking an uncontrollable regional escalation," the G7 leaders' statement said. "This must be avoided."

The United States would not participate in an Israeli response, if the country decides to strike back against Iran, U.S. defense and security officials said on Sunday.

But the final decision on whether Israel strikes back will fall to Netanyahu, Kirby said Monday.

"The president was also clear, as he has been throughout, that we do not seek a wider war in the region and we don't seek conflict with Iran," he said.

-ABC News' Kevin Shalvey