Russian forces are trying to slow down tanks in Ukraine by building "dragon's teeth", a type of fortification not seen in combat since the Second World War.
The obstacles, concrete blocks in the shape of pyramids, were built in Britain during the war as fears of a Nazi invasion grew, as well as in Germany.
Russia has started to build the defences around the occupied southern Ukrainian city of Mariupol, the UK's Ministry of Defence said on Wednesday.
"Dragon’s teeth have likely been installed between Mariupol and Nikolske village, and from northern Mariupol to Staryi Krym village," it said.
The concrete “teeth” are embedded at least one metre into the ground to hamper attempts to dislodge them.
Ukrainian tanks, which were mainly designed during the Soviet era, could be damaged if they are driven over the blocks.
Ukraine’s T-64BM Bulat tanks weigh 38 tonnes, making them a little heavier than the largest variant of the American Shermans used in the Second World War. The US vehicles were unable to pass over dragon’s teeth.
In the 1990s, South Korea built dense rows of the concrete blocks near Goyang, a satellite city of the capital Seoul, in the belief they could slow down the North’s Soviet-era tanks.
The defences are not intended to be completely impassable, but are instead used to channel attackers towards ambushes and areas where artillery fire can be concentrated, experts say.
The teeth were a major problem for the US Third Armoured Division as its tanks entered western Germany by crossing the Siegfried Line, which comprised bunkers and dragon’s teeth.
The US 23rd Armoured Engineer Battalion succeeded in crawling forward and placing explosives on the obstacles, but not before being attacked with heavy machinegun fire and mortars.
The teeth proved effective for Germany when American forces could not find a way around.
Are dragon's teeth effective today?
Russia is unlikely to install a defensive line in Ukraine as dense as the Siegfried Line, which was built over a period of several years starting in 1936, covered 600 kilometres, included nearly 20,000 bunkers and used about eight million tonnes of concrete.
It is possible that more modern tanks will be able to deal with the obstacles by using their main guns, a last resort in the Second World War when the guns were less powerful and less accurate.
Ukraine also has the US-supplied M58 Mine Clearing Line Charge, a trailer that lays a line of C-4 plastic explosives more than 100 metres long.
It is designed to clear obstacles as well as mines, and in theory could remove dragon’s teeth.
Ukraine is more likely to seek a way around the defences or send infantry to seize the far side of the barrier until engineering units arrive.
UAE currency: the story behind the money in your pockets
Key facilities
- Olympic-size swimming pool with a split bulkhead for multi-use configurations, including water polo and 50m/25m training lanes
- Premier League-standard football pitch
- 400m Olympic running track
- NBA-spec basketball court with auditorium
- 600-seat auditorium
- Spaces for historical and cultural exploration
- An elevated football field that doubles as a helipad
- Specialist robotics and science laboratories
- AR and VR-enabled learning centres
- Disruption Lab and Research Centre for developing entrepreneurial skills
Company%20Profile
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Terminal High Altitude Area Defense (THAAD)
What is THAAD?
It is considered to be the US' most superior missile defence system.
Production:
It was first created in 2008.
Speed:
THAAD missiles can travel at over Mach 8, so fast that it is hypersonic.
Abilities:
THAAD is designed to take out projectiles, namely ballistic missiles, as they are on their downward trajectory towards their target, otherwise known as the "terminal phase".
Purpose:
To protect high-value strategic sites, such as airfields or population centres.
Range:
THAAD can target projectiles both inside and outside of the Earth's atmosphere, at an altitude of 93 miles above the Earth's surface.
Creators:
Lockheed Martin was originally granted the contract to develop the system in 1992. Defence company Raytheon sub-contracts to develop other major parts of the system, such as ground-based radar.
UAE and THAAD:
In 2011, the UAE became the first country outside of the US to buy two THAAD missile defence systems. It then deployed them in 2016, becoming the first Gulf country to do so.
Global state-owned investor ranking by size
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Benefits of first-time home buyers' scheme
- Priority access to new homes from participating developers
- Discounts on sales price of off-plan units
- Flexible payment plans from developers
- Mortgages with better interest rates, faster approval times and reduced fees
- DLD registration fee can be paid through banks or credit cards at zero interest rates
Pharaoh's curse
British aristocrat Lord Carnarvon, who funded the expedition to find the Tutankhamun tomb, died in a Cairo hotel four months after the crypt was opened.
He had been in poor health for many years after a car crash, and a mosquito bite made worse by a shaving cut led to blood poisoning and pneumonia.
Reports at the time said Lord Carnarvon suffered from “pain as the inflammation affected the nasal passages and eyes”.
Decades later, scientists contended he had died of aspergillosis after inhaling spores of the fungus aspergillus in the tomb, which can lie dormant for months. The fact several others who entered were also found dead withiin a short time led to the myth of the curse.
Small Victories: The True Story of Faith No More by Adrian Harte
Jawbone Press
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COMPANY PROFILE
Name: Kumulus Water
Started: 2021
Founders: Iheb Triki and Mohamed Ali Abid
Based: Tunisia
Sector: Water technology
Number of staff: 22
Investment raised: $4 million
Read more about the coronavirus
TICKETS
Tickets start at Dh100 for adults, while children can enter free on the opening day. For more information, visit www.mubadalawtc.com.
Results
3pm: Handicap (PA) Dh40,000 (Dirt) 1,000m; Winner: Dhafra, Antonio Fresu (jockey), Eric Lemartinel (trainer)
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4pm: Handicap (PA) Dh40,000 (D) 1,700m; Winner: Ashtr, Abdul Aziz Al Balushi, Majed Al Jahouri
4.30pm: Handicap (TB) Dh40,000 (D) 1,700m; Winner: Falcon Claws, Szczepan Mazur, Doug Watson
5pm: Sheikh Dr Sultan bin Khalifa Al Nahyan Cup – Prestige Handicap (PA) Dh100,000 (D) 1,700m; Winner: Al Mufham SB, Al Moatasem Al Balushi, Badar Al Hajri
5.30pm: Sharjah Marathon – Handicap (PA) Dh70,000 (D) 2,700m; Winner: Asraa Min Al Talqa, Al Moatasem Al Balushi, Helal Al Alawi
UAE-based players
Goodlands Riders: Jamshaid Butt, Ali Abid, JD Mahesh, Vibhor Shahi, Faizan Asif, Nadeem Rahim
Rose Hill Warriors: Faraz Sheikh, Ashok Kumar, Thabreez Ali, Janaka Chathuranga, Muzammil Afridi, Ameer Hamza
Our legal columnist
Name: Yousef Al Bahar
Advocate at Al Bahar & Associate Advocates and Legal Consultants, established in 1994
Education: Mr Al Bahar was born in 1979 and graduated in 2008 from the Judicial Institute. He took after his father, who was one of the first Emirati lawyers
Killing of Qassem Suleimani
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FROM%20THE%20ASHES
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The specs
Engine: 3.9-litre twin-turbo V8
Transmission: seven-speed
Power: 720hp
Torque: 770Nm
Price: Dh1,100,000
On sale: now
Volvo ES90 Specs
Engine: Electric single motor (96kW), twin motor (106kW) and twin motor performance (106kW)
Power: 333hp, 449hp, 680hp
Torque: 480Nm, 670Nm, 870Nm
On sale: Later in 2025 or early 2026, depending on region
Price: Exact regional pricing TBA
THE SPECS
Engine: 4.0L twin-turbo V8
Gearbox: eight-speed automatic
Power: 571hp at 6,000rpm
Torque: 800Nm from 2,000-4,500rpm
Fuel economy, combined: 11.4L/100km
Price, base: from Dh571,000
On sale: this week
Origin
Dan Brown
Doubleday