Watch the video in the last post to see what is really going on.
Youths hurled rocks and fire bombs at riot police in central Athens on Tuesday as a general strike against new austerity measures brought the country to a standstill.
Lawmakers are embarking on their second day of debate on austerity measures that must be passed in votes on Wednesday and Thursday if Greece is to receive another batch of bailout funds to see it beyond the middle of next month.
If the votes don't pass, Greece could become the first eurozone nation to default on its debts, and that could send out huge shock waves through the global economy.
The new austerity drive is proving hugely unpopular in Greece and a demonstration in central Athens soon descended into violence.
For several hours, police fired volleys of tear gas and stun grenades at masked and hooded youths just before the second day of debating was to resume.
Two groups of protesters appeared to clash with each other at one point. One side took refuge near a coffee shop, and police fired tear gas in an attempt to clear the crowds and get them out.
The situation quickly degenerated, with masked and hooded youths pelting police with chunks of marble ripped off building facades and steps.
They set fire to giant parasols at an outdoor cafe, using some to form barricades, and smashed windows of a McDonald's outlet and other snack shops.
Staff at upscale hotels handed out surgical masks to tourists and helped them with rolling luggage past the rioting, over ground strewn with smashed-up marble and cement paving stones.
Youths torched a satellite truck parked near parliament. The fire caused a freezer at a neighboring kiosk to explode, and hooded youths ducked behind the burning truck to help themselves to ice-cream cones.
"The troublemakers are attacking the police fiercely and trying to disrupt a peaceful protest," police spokesman Athanasios Kokalakis said.
Officials said four police officers were injured by flying stones and one person was stabbed during fights between rival groups of young demonstrators and three others were injured while a number of people were treated with breathing troubles.
Eighteen people were detained and three formal arrest charges were laid, police said.
Violence continued throughout the afternoon and protesters set fire to two communications trucks with mobile telecoms transmitters which they had apparently mistaken for TV trucks and sprayed with slogans attacking the media and banks.
Riot police charge
As a crowd initially estimated at more than 20,000 thinned out, clouds of white smoke swirled above the square and police with shields and riot helmets stood by, occasionally launching charges to disperse a harder core of mainly young demonstrators.
The clashes came at the start of a two-day strike called by unions furious that the new euro28 billion ($40 billion) austerity program will slap taxes on minimum wage earners and other struggling Greeks.
The measures come on top of other spending cuts and tax hikes that have sent Greek unemployment soaring to over 16 percent.
"The situation that the workers are going through is tragic and we are near poverty levels," said Spyros Linardopoulos, a protester with the PAME union blockading the port of Piraeus. "The government has declared war and to this war we will answer back with war."
The scale of the strike bought large parts of the Greek economy to a halt.
Everyone from doctors and ambulance drivers to casino workers and even actors at a state-funded theater were joining the strike or holding work stoppages for several hours.
"The measures are for the good of the banks not for the good of workers," said Yannis Tsounis, 38, a municipal worker. "Europe must not see us as pariahs. We are beginning to feel as not being a part of Europe."
An ongoing strike by electricity company workers kept up rolling blackouts across Greece. Not far from the violent protest, cafes and ice cream vendors popular with tourists used portable generators to keep the power on.
Hundreds of flights were canceled or rescheduled as air traffic controllers walked off the job for four hours in the morning. Another walkout is scheduled for later. Strikes by public transport workers snarled traffic across the capital and left tourists stranded around Piraeus.
Many Greeks insist they should not be forced to pay for a crisis they believe politicians are responsible for.
"We don't owe any money, it's the others who stole it," said 69-year-old demonstrator Antonis Vrahas. "We're resisting for a better society for the sake of our children and grandchildren."
In a sign the discontent has spread well beyond the union movement and far left, the Greek Confederation of Commerce (ESEE), a trade association of retailers, also rejected measures its leader Vassilis Korkidis denounced as "predatory".
It urged shopkeepers to raise Greek national flags at their stores and announced an internet campaign to convince cabinet members and MPs to renege on the austerity plan.
Despite the discontent being displayed -- a sizable but peaceful demonstration was held in Greece's second city Thessaloniki -- the country's lawmakers are preparing for their second day of debate over the austerity measures.
The package must be passed so the European Union and the International Monetary Fund release the next installment of Greece's euro110 billion ($156 billion) bailout loan.
Without that euro12 billion ($17 billion) installment, Greece faces the prospect of a default next month -- a potentially disastrous event that could drag down European banks and hurt other financially troubled European countries.
Finance Minister Evangelos Venizelos called on lawmakers to back the austerity measures, saying it was vital to convince Greece's creditors that it had a plan.
"The government is running out of time and so is the opposition," he told parliament. "We are handling our country's history right now and nobody can play with that."
But even lawmakers from the governing Socialists have been upset over the latest measures and Prime Minister George Papandreou has struggled to contain an internal party revolt.
He reshuffled his cabinet earlier this month to try to ensure his party's support for this vote, but the Socialists still only have a 5-seat majority in the 300-member Parliament.
European officials have been pressuring Greece's the main conservative opposition party to back the austerity bill but so far their urgings have failed to convince conservative party leader Antonis Samaras.
"I trust that the Greek political leaders are fully aware of the responsibility that lies on their shoulders to avoid default," European Monetary Affairs Commissioner Olli Rehn said.
As well as looking to get the next batch of bailout funds, Greece looks like it will need another financial rescue.
The initial plan had assumed that Greece would be able to return to the markets next year.
That doesn't look like it's going to happen so Greece is looking for more money. Papandreou has said a second bailout would be roughly the same size as the first and hopefully on better terms.
"I call on Europe, for its part, to give Greece the time and the terms it needs to really pay off its debt, without strangling growth, and without strangling its citizens," he said.
Even with the new austerity measures and a second bailout, many investors still think Greece is heading for some sort of default because its overall euro340 billion debt burden is too great.
In a speech to shareholders in Athens, the head of EFG Eurobank, Greece's second-largest bank, said it was vital that the austerity measures were passed in parliament.
"Today, what is at stake for the country is its very future. Individually and collectively, we must all realize how crucial the situation is and join the collective effort for the big chang