"Thinking of those hurt in #Hamburg protests".
"I think boring is fair", Tom Wright, director of the Center on the United States and Europe at the Brookings Institution, tells me when asked about the typical course of a G20 meeting.
There is widespread material damage and more than 200 people are arrested.
The five permanent members of the UN Security Council - the world's movers and shakers - all seek different outcomes from the Hamburg summit. They should not be attacked and criminalised by the police but should be allowed to demonstrate against a gathering of world leaders who have so singularly failed to address the major problems facing us today. An estimated 100,000 protesters were expected to converge on the old merchant city during the summit.
For Vladimir Putin the Hamburg summit offers a welcome photo-op.
She also commented on clashes between police and protesters outside the summit, saying violent protests were unacceptable. There is unlikely to be any progress on either Ukraine or Syria.
The meeting opens after skirmishes Thursday evening between police and violent protesters elsewhere in the port city, Germany's second-biggest.
Instagram permitirá responder a las Historias con fotos o video
Así lo entiende Instagram , que hoy comienza a desplegar la posibilidad de responder mediante fotos y vídeos a las historias. Es más se puede usar cualquier herramienta creativa de la cámara para las respuestas a Historias, inclusive filtros de cara.
The Chinese state news agency Xinhua reported that President Xi had called on G20 nations to strengthen macroeconomic policy coordination and forestall risks in financial markets.
Instead, Prime Minister May opted to call for a crackdown on terrorist financing.
North Korea will "play a significant part" in the discussions, with China facing intense pressure to rein in its ally after Pyongyang's latest missile launch.
Then again, the G20 is not necessarily the venue of choice to change the world for the better. That's how the rule of law works.
Protesters appeared to disrupt some G20 visitors' movements around the city.
Merkel has been particularly firm on the issue of climate change, pledging to forge on, even without U.S. involvement.
All of which is on show in Hamburg, if you know where to look. As global defender of liberal values, Mrs Merkel finds herself surrounded by swaggering populists as Trump, Putin, and Erdoğan. But for the German chancellor, who this year presides over the G20 grouping of big economies, ... health care is a key element of Germany's engagement with the developing world - Africa in particular.
"On the issue of trade, virtually everyone believes we needfree but also fair trade", Mrs Merkel said. Forty-five water cannons were available to disperse crowds, and a no-fly zone was in place over portions of the city. Leaders have said they will pursuade Trump to rejoin the Paris agreement.