The U.S. government is banning all flights to and from Israel's main airport in Tel Aviv.
Their reasoning? On Tuesday, a rocket launched by Hamas in Gaza struck just a mile away from Ben Gurion Airport.
Israel is urging the U.S. to reconsider but the White House says it won't overrule the ban.
This comes just days after a Malaysia jet was shot down mid-air over a war zone in eastern Ukraine. All 298 passengers on board were killed.
There are dangerous fly zones all over the world and it might be a surprise to many that passenger jets fly through them daily.
So, why aren't these combat areas off-limits for flights?
CNN's Rene Marsh has this OutFront investigation.
U.S. Secretary of State John Kerry has arrived in Cairo in an attempt to negotiate a cease-fire between Israel and Gaza. Kerry said Monday the United States would provide $47 million dollars in humanitarian assistance to Gaza.
As the fighting rages on, the death toll continues to climb. Gaza health officials say about 565 Palestinians have been killed in the fighting, about 70 percent are believed to be civilians.
Israeli officials say two citizens and 25 soldiers have died. Among the dead soldiers were two Americans.
CNN's Polo Sandoval has more on why Americans are traveling to the Middle East to fight for Israel.
Hopes for quiet and calm in the Middle East, dashed as the rocket barrage between Israel and Gaza resumes. Israel stopped its attacks for 6 hours.
But Hamas never accepted the terms of the cease-fire and never stopped firing. Israel says it's been hit by 141 rockets total since 9am ET Tuesday - that's the equivalent of one rocket every 6 minutes.
'Failure is not an option': But Israel, Hamas can't agree on cease-fire
Israel has now confirmed its first fatality in this conflict. But in Gaza, the death toll is much higher, nearly 200 people killed.
Many civilians among the dead.
OutFront, State Department Spokesperson Jen Psaki.
The Israeli security cabinet is set to meet Tuesday morning to review a ceasefire proposal put forward by Egypt.
Israeli officials say the proposal is being taken very seriously. But Hamas may not be willing to negotiate.
A Hamas spokesman describes Egypt's proposal for a cease-fire as a joke: "It's an initiative for the media. It's not a political initiative."
U.S. officials, meanwhile, tell CNN Secretary of State John Kerry is preparing a possible trip to the Middle East to lay the groundwork for a ceasefire agreement.
OutFront, the former Israeli Ambassador to the United States- and now a CNN Middle East analyst – Michael Oren.
The Middle East is on the brink of a ground war. The Israeli government is warning of a ground war as the back and forth air strikes with Hamas intensifies. According to Israel, militants fired more than 130 rockets at the Jewish state.
Israel says its Iron Drome Missile defense system has intercepted a number of those attacks. Israel also unleashed an air assault of its own, aimed at crippling the militants rocket-launching ability.
At the U.S. embassy in Tel-Aviv, people were rushed to an underground shelter.
How close is Israel to launching a ground invasion?
OutFront, Israel's Ambassador to the United States Ron Dermer.