See Israel's advanced missile defense systems that inspired Trump's 'Golden Dome'

Earlier this week, Trump detailed his plans to build the "Golden Dome," previously known as the "Iron Dome for America," as defense contractors and tech companies already line up to be considered for development.

"We'll have it done in three years," Trump told reporters at the White House on May 21. "Once fully constructed, the Golden Dome will be capable of intercepting missiles even if they are launched from other sides of the world."

While Israel's air defense network is considered one of the most advanced aerial defense systems in the world, the missile shield is responsible for defending a country roughly the size of the state of New Jersey — the second smallest US state — from short-range threats.

Trump aims to make the Golden Dome a space-based missile system to defend the US — about the size of continental Europe — against advanced ballistic and hypersonic missile threats from the world's most powerful countries. Russia has an estimated 4,300 nuclear warheads in its arsenal, each of which a system like Golden Dome must be capable of defeating, necessitating an even larger number of intercept missiles and other weapons.

"I think that this year, we're going to see a different national conversation about space," Tom Karako, a missile defense expert at the Center for Strategic and International Studies, told Business Insider.

About 15% of Israel's defense budget comes from the US. Since its founding in 1948, the US has sent Israel about $300 billion in economic and military aid, making it the largest cumulative recipient of US foreign aid.

Nearly all of the aid the US has sent in recent months has been allocated to its advanced defense systems and military equipment. But America's involvement in Israel's war in the Gaza Strip has grown controversial. The US is providing limited humanitarian aid to Palestinians in Gaza while also providing military support and weapons to Israel.

More than 40,000 Palestinians have died since October 7, 2023, according to the Ministry of Health in Gaza.

The most well-known of Israel's air defense systems, the Iron Dome, consists of a network of radar detectors and missile launchers used to intercept enemy fire, including short-range rockets and artillery.

Deployed in southern Israel in 2011 following the war between Israel and Hezbollah, the US helped and funded the development of the short-range rocket defense system. It contributed at least $1.6 billion to the Iron Dome system from 2011 to 2021, as well as another $1 billion in 2022.

The Israel Defense Forces said the objective of the Iron Dome is to "protect Israeli civilians from the constant threat of rockets by intercepting them." The IDF described the Iron Dome with three adjectives: "accuracy, speed, and capacity."

Armed with Tamir interceptor missiles, the multi-mission defense system can shoot down enemy rockets and artillery up to 43.5 miles away. The advanced missile system has a radar station that detects and tracks the course of enemy rockets before launching a missile to intercept them. The missiles track their target with electro-optical sensors and detonate in the air when close.

While the Iron Dome doesn't have a perfect interception record, it has blocked a majority of enemy fire in Israeli airspace, especially at times of intense barrages from Hamas militants.

But the Iron Dome is just one layer of what is considered one of the most advanced air defense systems in the world.

Missiles have a much longer range than shells, but they also have the disadvantage of being expensive. The Tamir missiles fired by Iron Dome are estimated to each cost around $50,000.

The middle layer of Israel's Iron Dome defense system is David's Sling, a medium- to long-range air defense system designed to intercept missiles as far as 185 miles away.

Also known as the Magic Wand, the versatile missile system carries up to 12 interceptors. Its command and control center, known as the Golden Almond, provides threat assessment and plans and controls interception, complemented by the system's multi-mission radar used to detect and track airborne threats.

The top layer of Israel's sophisticated air defense system is Arrow-3, which is capable of engaging targets at longer ranges and higher altitudes and more precisely intercepting ballistic missiles.

Arrow-3 interceptor operates with the Arrow Weapon System, the world's first operational, national, stand-alone anti-tactical ballistic missile defense system, according to Israel Aerospace Industries, the primary contractor for the AWS. The system was developed in partnership with Boeing and with significant funding from the United States.

Arrow-3 works in conjunction with its predecessor, Arrow-2, to intercept ballistic missiles and other warheads using a two-stage interceptor.

Arrow-3's "interceptor is a world-class missile that, together with the Arrow-2, significantly expands the State of Israel's defense capabilities," according to Israel's Ministry of Defense.

In November 2023, Israel confirmed the first operational use of the Arrow-3 to stop an inbound enemy missile launched by Houthi militants from Yemen, marking the first time all three layers of Israel's aerial defense were working simultaneously.

"All of these provide protection in every layer of aerial defense and enable optimal protection of the Israeli home front," the IDF said in a statement at the time.

Last October, Iran attacked Israel with a large barrage of ballistic missiles — a rare direct attack that came after a White House warning to its ally.

The missile attack came after the IDF killed the head of Hezbollah and then launched a "limited" ground offensive against Hezbollah targets in southern Lebanon. At the time, the US adjusted its force posture in the Middle East, stationing a substantial force of warships and fighter aircraft across the region to defend Israel and its bases.

Israel's air defense system isn't just limited to land. The country also has a naval version of its Iron Dome system, mounting it aboard Israeli missile boats.

The naval version of the aerial defense system, known as C-Dome, is deployed aboard Sa'ar 6-class corvettes, four German-made warships ordered for Israel's navy.

In addition to the C-Dome, Sa'ar 6 vessels are also equipped with a 76mm Oto Melara Super Rapid main gun, which is effective against close aerial threats.

After two years of development, Israel's military announced Monday that the seaborne defense system was used for the first time to intercept a "suspicious aerial target" that entered Israeli airspace near the city of Eilat, which has been frequently targeted by Houthis in Yemen in support of Hamas.

"Overnight, for the first time ever, an IDF Sa'ar 6-class corvette missile ship successfully intercepted a UAV (uncrewed aerial vehicle) that had approached from the east and had crossed into the area of the Gulf of Eilat," the IDF said.

In addition to the four Sa'ar 6-class corvettes, the Israeli naval fleet includes 11 other warships and five Dolphin-class submarines.

To further bolster its air defenses, Israel is also looking at a new "all-in-one" surface-to-air missile system called SPYDER, manufactured by Israeli defense company Rafael Advanced Defense Systems.

Israel, in collaboration with Rafael, is testing a new configuration for the weapons system, taking the missile launcher, radar, command and control system, and technology for surveillance and target acquisition, and fitting it to an eight-wheel drive vehicle.

"Developed to address the critical operational needs of the modern battlefield, the SPYDER AiO provides an agile, autonomous, air defense asset, capable of rapid deployment within minutes, in challenging terrains, and with short reaction times," according to a fact sheet from Rafael.

Designed to carry up to eight canisterised missiles, including I-Derby SR, I-Derby ER, and Python-5 SR, it can engage up to four targets at a time, with a maximum range of up to nearly 25 miles and an altitude of 7.4 miles, according to the fact sheet.

In January 2024, Israel's defense ministry announced a successful test run of the new weapons system configuration, which is capable of intercepting drones, aircraft, cruise and ballistic missiles, and precision-guided munitions.

Editor's note: This article was originally published in April 2024 and has been updated in May 2025.