instruction:
In this task, you are given an article. Your task is to summarize the article in a sentence.
question:
The head of the Halo Trust was speaking after the prince travelled to Angola to see the charity's mine clearance work.
Prince Harry visited Cuito Cuanavale and met those benefiting from the work.
The charity was championed by his late mother Princess Diana and is the oldest organisation of its kind. The prince is patron of its 25th Anniversary Appeal.
In 2010 he met some of Halo's teams working in Mozambique.
Shortly before her death in 1997, Princess Diana was filmed visiting minefields that were being cleared by the trust in Angola, drawing the world's attention to the situation.
The town of Cuito Cuanavale in south-eastern Angola is believed to be the most densely mined town in Africa, following the country's bloody and protracted civil war.
In a statement issued by Kensington Palace, Prince Harry said he was keen to support the charity in any way he could.
The trip took place earlier this month and Prince Harry's spokesman announced at the time that he was in Angola.
But the Dumfriesshire-based Halo Trust said it had decided to delay providing further details until now because of the fact that it was taking place in a private capacity and the "complicated field logistics" involved.
Its chief executive Guy Willoughby said: "He [the prince] is irritated about the countries that supplied these landmines are not actually putting in any funds to clear them 25 years later.
"He has got quite a bee in his bonnet about that, and that is good.
"The commitment shown by Prince Harry plays an invaluable role in helping us to raise awareness of Halo's work and mission.
"He is technically very competent but he's also very good with dealing with the people, the villagers, the de-miners and he understands the big issue, even the political issue.
"Wars may be over but many people are still unable to resume their normal lives, facing the threat of death or injury by landmines every day."
He told BBC News that being able to support the charity was "hugely important" to Prince Harry, not just because of the family connection.
"As a soldier he is seeing so many people of his generation, of his age losing limbs. And that has really brought a focus on it.
"I think it has brought a focus on it for a lot of the British population of seeing so many people in their 20s who are losing limbs."
Angola's civil war left an estimated 500,000 dead, displaced four million and destroyed much of the country's infrastructure.
Despite huge efforts since the war ended in 2002 to clear the explosives, the country remains one of the most heavily mined in the world.
The Halo Trust said it has destroyed more than 21,300 anti-personnel and anti-tank mines in Angola but thousands of residents have been killed or maimed.
Mr Willoughby said Halo was making "excellent progress" in Angola and the province of Huambo was now close to becoming mine-free, but there was still 19 years of clearance work to be done across the country as a whole.
answer:
Prince Harry is "irritated" that some nations which provided landmines are not helping with the clearance effort, one of his charities has revealed.


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Mixu Paatelianen said his team's performance was "flat" and "unacceptable". That turned out to be merely the prelude to stronger criticism from Tannadice chairman Stephen Thompson.
In a statement that addressed the team having "failed miserably on the pitch", Thompson admitted to mistakes made in the boardroom.
He finished with a withering remark: "The current playing squad now have 13 matches to preserve the club's Premiership status and redeem their own professional reputations."
Click here to listen to Wednesday's Scottish football podcast featuring Dundee United discussion
The 3-0 home loss was chastening, not least because United seemed to have embarked upon a revival, with two wins and a draw in their three games prior to Motherwell's visit.
It was the moment in the season when Paatelainen's side had to show that they could recover, that resilience and purpose would underpin a revival.
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It fell short - jarringly so for supporters as much as the manager and the chairman - and has left United now feeling as though they are in the last throes of this campaign.
It might already feel lost, although Thompson's strong, blunt words can be read as an attempt to provoke a sudden burst of defiance.
Even so, desperation has invaded every aspect of the club. The boardroom mistakes Thompson admitted to might include not engaging in a more critical overview of the recruitment decisions made in the last two transfer windows.
Supporters inevitably first turn their frustrations on the manager and it seemed as though the opinion of some of the fans had turned implacably against Jackie McNamara before he was relieved of his position last September.
McNamara had endured a disappointing 2015 after the winter transfer window closed with the club selling Gary Mackay-Steven and Stuart Armstrong to Celtic on deadline day.
United played 30 league games under McNamara in 2015, losing 17 of them and winning seven (23%), while his overall record was played 99, lost 39 and won 38.
The team's record in the Premiership under Paatelainen is played 15, lost 10 and won two - a win rate of 13%. When the Finn took charge, United were bottom of the table, but only one point adrift of Partick Thistle. Only 12 points separated United from Hearts in third place.
Now, United are 13 points behind second-bottom Kilmarnock, albeit they have a game in hand. The run of results under Paatelainen has been poor and there has been little sign of any kind of resurgence.
The team was already in wretched form when he succeeded McNamara but Ross County were also bottom when Jim McIntyre was appointed as manager in September 2014 and once the January transfer window closed, he steered his side to 10 victories from their remaining 15 league game and finished ninth - eight points clear of the relegation play-off place.
The comparison is damning for Paatelainen, because it shows that alternative was possible to the growing sense of resignation about the club's fate.
Supporters, in the main, seem to have almost accepted relegation is inevitable, although the inconsistency of all the sides in the bottom half of the Premiership means that nothing can be taken for granted.
There are more fundamental issues to be addressed, though. Thompson has previously been adamant that he sees Paatelainen as the right manager for United in the longer term.
January signings were underwhelming, with only Eiji Kawashima and Guy Demel starting regularly, although it is generally a difficult window to do business in.
In his statement, Thompson says that United have the third-highest wage bill in the top flight, which means that in the space of less than two seasons Hearts have built a squad of better ability and value for money.
That ought to alarm a club that has been established in the top six until this season and has a large playing squad.
There is also the potential financial consequences of relegation for a club that runs at a loss and has been reliant on player sales to counter that.
Thompson's statement admits to failings, by the board and by the team. It also represented a last attempt by the chairman to rebuke the players into a response.
Whatever happens, though, United need to improve their recruitment. Two managers have failed to wring more out of the squad, or improve it across two transfer windows. The legacy of that could be a spell out of the top flight.
answer:
The aftermath of Dundee United's defeat by Motherwell has been a period of recriminations.


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Tuesday 21 January was a fairly normal day in Pakistan. Twenty-nine Shia Muslims were killed by Sunni militants near Quetta in Balochistan province after a suicide bomber rammed a car filled with explosives into the bus they were travelling in. Meanwhile, in Karachi, three Shias were shot dead, in another attack claimed by Sunni extremists.
And on the same day, renowned Urdu writer and professor Asghar Nadeem Syed was wounded by unknown gunmen in Lahore.
Meanwhile three anti-polio vaccinators, including two women, were gunned down in Karachi by Taliban militants - the third such attack in Karachi in a week.
Meanwhile, the army claimed it had killed 40 militants in a bombing raid that was itself retaliation for a suicide attack near army headquarters in Rawalpindi the day before. That attack left 13 people, including eight soldiers, dead.
A day earlier, 20 soldiers were killed in a bomb attack on an army convoy in the north-west of the country.
That attempted army show of force only encouraged further attacks by the Taliban, who killed 12 security personnel in different incidents on 22 January.
The violence is unsparing, unprecedented and reaching frightening proportions.
There has been a flight of capital in recent months and many of the elite are sending their children out of the country.
For months, Nawaz Sharif's government has had a fruitless policy of wanting to negotiate with the militants, but that has made no headway and now lies in a shambles.
Yet Mr Sharif appears paralysed, with no sense of urgency over tackling the crisis, which would entail abandoning the false hope of talks and giving the army orders to go after the extremists.
Since he came to power last June, Mr Sharif has moved very slowly on his entire promised agenda of economic reform, making peace with India, encouraging reconciliation in Afghanistan and countering militancy at home. He appears overweight and ill, and many people fear he has given up.
Strains between the army and the civilian government are multiplying - with the army now extremely frustrated at the government's policy paralysis while its soldiers die in unprecedented numbers.
However, neither the army nor the government have shown any signs of adopting a zero-tolerance approach to terrorism, which would mean going after all terrorist groups, including those Punjabi groups who fight against Indian rule in Kashmir.
Yet the militants are gaining ground every day by demoralising the public and the security forces with their persistent attacks.
Pakistani Taliban attacks on military personnel and civilians now include mass bombings of mosques, churches and bazaars. And in recent months the Taliban have become adept at targeted killings of politicians, bureaucrats and senior officials in the army and police, too, using suicide bombers, gunmen on motorbikes or mines laid in the road.
Meanwhile the Sunni extremist group Lashkar-e-Jhangvi, whose leaders live openly in Punjab but have not been arrested, is carrying out a virtual genocidal campaign against Shias across the country.
The anti-Shia campaign is now nationwide and affecting every city and province, including Punjab, which was considered safe until recently.
''Militant groups... operate with virtual impunity across Pakistan as law enforcement officials either turn a blind eye or appeal helpless to prevent attacks,'' said Human Rights Watch in its annual report released on 21 January. The report says that Taliban attacks now amount to war crimes.
So dire is the situation that Bill Gates, whose foundation is helping fund the campaign to make Pakistan polio-free, has suggested suspending that aim because of the violence, with nearly 30 polio vaccinators killed in the past 24 months by the Taliban. ''The Pakistan violence is evil,'' Mr Gates told reporters in New York on 22 January.
It is clear to everyone what needs to be done.
People think Mr Sharif needs to address the nation on TV and describe how dire the situation is. He then needs to rally as many opposition political parties to his side as will join him - and those which do not can be deeply embarrassed by the government and the army for supporting terrorism. Finally, he needs to order the army to clear up the main hub of militancy in North Waziristan.
However, the problem has become more complicated in recent months as Islamic extremists in Karachi, Sindh, Punjab and Balochistan, who were once separate, isolated and operating independently, now appear to have come under the banner of the Movement of Pakistani Taliban. Collectively, they are aiming at toppling the system, defeating the army and imposing a caliphate in the country.
The world has seen the dramatic resurgence of al-Qaeda in Iraq and Syria, which has greatly complicated the civil war in Syria. Nobody would have thought that al-Qaeda had the power to conquer cities, but that is exactly what it has done in Iraq with the capture of Falluja and Ramadi.
Similarly, so bad is the security situation in the Pakistani border towns of Peshawar and Quetta, as well as the sea port and trading hub of Karachi, that it may not be far off when an urban area - or part of one - falls into the hands of the Pakistani Taliban.
If the present security situation worsens, the next step for the Taliban is an urban insurrection, while tensions between the military and civilians could lead to a military-led state under emergency or even martial law.
answer:

Violence is soaring to new levels in Pakistan, with militants unleashing a wave of deadly attacks - and the government is dithering about what to do, writes guest columnist Ahmed Rashid.


