Hamburg's police have already had to deal with violent protests at the G20 summit. Hi-tech water cannons were used to disperse crowds on 4 July, injuring five people. Protesters are expected to hoard weapons at secret locations ahead of the summit where global trade, terrorism, climate change, North Korean missiles, Brexit, digitalisation and empowering women will be on the agenda. Body language will be scrutinised in the first face-to-face meeting between Presidents Trump and Putin: pray for a working dialogue between these two leaders. US attitude to trade following Trump's 'America First' policy could be a bone of contention, as will climate change after President Trump pulled out of the Paris climate change agreement. Pray that globalisation and climate solutions are negotiated with a win/win attitude. Angela Merkel has based the talks around an 'interconnected' world, and will address differences between countries.