The Halo trust said "excellent progress" has been made between Princess Diana's visit to Angola in 1997 and Prince Harry's trip this year, but there are "many years of work to be done".
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.
Halo is making excellent progress in Angola, with the province of Huambo now close to becoming mine free, but there are still many years of work to be done.
With support from Prince Harry, Angola and the international community, Halo will continue to work towards a mine-free Angola for the benefit of the Angolan people.
More top news
The Crown Prosecution Service is to announce its decision later on whether individuals and organisations will face criminal charges.
Hollywood actor Jim Carrey has failed in his attempt to get a wrongful death lawsuit over his ex-girlfriend's suicide thrown out of court.
Talks at Stormont aimed at restoring power-sharing have adjourned with little sign of the DUP and Sinn Fein reaching an agreement.