Hundreds of people including trade union members, MSPs and anti-austerity campaigners have taken part in a march against nuclear weapons.
Organisers, the Scrap Trident coalition, led the demonstration through the centre of Glasgow and held a rally in the city's George Square.
The coalition wants to see the UK Government dispose of nuclear weapons and instead use its budget to fund health, education and welfare.
The rally is part of a weekend of events which will see workshops in George Square tomorrow and a blockade of the Faslane Naval Base on the Clyde on Monday, where Trident missiles are stored.
The demonstration grew in size as it wove its way through St Vincent Street, Argyle Street and Ingram Street.
A police spokesman at the scene estimated that up to 2,000 people were marching.
One of the march organisers, Brian Larkin, co-ordinator of the Edinburgh Peace and Justice Centre, said Trident should be scrapped and the money put into "human needs" instead.
"We want the resources that go into Trident to fund disability benefits, create jobs, scrap the bedroom tax, fund the NHS, fund education and fund welfare," he said.
"Obviously you can't fund all of it with that but we want further cuts in the military. We don't want to be associated with Nato, we want Scotland to take a different tack from the UK and to be true to itself.
"This time around there's a strong feeling against the current Con-Dem Government's programme of austerity measures.
"The poorest people are paying the price; regular, ordinary working people.
"The momentum is moving in the nuclear disarmament movement. Now is the time to make a concerted effort to disarm Trident and not replace it with any other nuclear weapons system."
Having Trident does not make the UK a safer place to be, he said.
"One hundred and eighty-seven countries in the world don't have nuclear weapons. What do we need them for?"
Mr Larkin described the the number of people turning out for the protest as "really encouraging".
He said: "Turnout is really strong. We've got people from trade unions, disability rights campaigns, anti-austerity campaigns. We also have a really strong youth turnout. This new generation is recognising the importance of putting resources away from Trident, away from the military and putting them towards people."
Some of the groups represented at today's event included Scottish CND, Trident Ploughshares, the Edinburgh Peace and Justice Centre, Faslane Peace Camp, the Quakers and the Educational Institute Scotland (EIS).
Green Party co-convener Patrick Harvie was also at the rally.
He said: "Trident is a weapons system that is incapable of discriminating between civilian and military targets. It can only ever be used for the mass slaughter of innocent civilians. It's not a weapons system that we should be renewing.
"This time we're on the verge of actually being able to take a decision that will get rid of Trident once and for all. If we vote Yes (to Scottish independence) in 2014 then we have the opportunity to rid Scotland of this disgusting, offensive and illegal weapons system and actually make Scotland a force for peace in the world. It's a really exciting moment for this movement."
Speaking after addressing the rally, the SNP MSP for Glasgow Kelvin, Sandra White, said: "The groundswell of opposition against Trident among the people of Scotland demonstrate the overwhelming moral and economic case for ridding Scotland of nuclear weapons.
"But it's not only the thousands of people gathered here today who are opposed - we know from recent opinion polls that a massive 80% of Scots are against Trident renewal. It's time for Westminster to take notice."
She added: "The UK is the fourth most unequal society in the developed world. The Westminster Government tell us we can't afford to fund our social security system, but at the same time they can find £100bn to spend on weapons of mass destruction. This is abhorrent.
"Trident is not wanted, it is not needed, and it is not affordable, and we will not stop repeating this until Scotland is nuclear-free."
The Scrap Trident Coalition said 29 MSPs support their campaign. The SNP supports the removal of Trident from Scottish waters but changed its policy last year to support membership of Nato, in the event of a Yes vote in the referendum in September next year.
EIS president Susan Quinn said: "The EIS is a long-standing affiliate of the campaign for nuclear disarmament and are happy to support any opportunity to raise issues around Trident.
"We see the ongoing funding of this project as a waste of public money especially in times of harsh cuts to spending in all areas of the public sector."
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