The first Lady was due to take part in an event with other world leaders' spouses.
"Disgusting and unpatriotic," one Twitter user wrote.
It is the finest address in Hamburg city and also one of the safest.
Beijing considers the Liaoning, its first "combat ready" carrier, as a symbol of China's great-power status.
The man was wearing a bulletproof vest and carrying throwing knives as well as a forged ID card.
"My kid's day camp was far better organized", one Twitter user wrote.
20,000 police face up to 100,000 protesters, including an estimated 8,000 who police say are prepared to use violence.
The Vice-President has just been appointed chairman of the National Space Council but showed little regard for their rules.
Labour see massive increase in polls following Theresa May's difficult first month since June's result.
Trump shakes Putin's hand at the G20 summit in Hamburg, Germany.
Russian and US presidents are widely expected to discuss North Korean situation and Syrian conflict.
The bombers also held exercises with Japanese fighter jets in the East China Sea.
Pyongyang termed South Korean forces as 'puppet military gangsters' in its latest rhetoric.
Riot police fired water cannon and pepper spray at anti-capitalist demonstrators in Hamburg.
Demonstrators gathered against the G20 summit taking place in the German city.
It is not the first time the US President has been refused a handshake in public.
The White House officials were left red-faced as they hurried to find a place for the president to stay
Internet users are heavily critical of CNN for locating and threatening a Reddit user over his posts.
US president issued plea a day before the two world leaders will meet for the first time at the G20 summit.
India and China are at loggerheads over a border road construction by Beijing.
Tensions have increased since successful test of an intercontinental ballistic missile
The biggest names in global politics will all be in attendance.
The US president made his comments ahead of his first meeting with the Russian leader at the G20 summit.
The Philippines president's 'cannibalistic' warning comes after bodies of decapitated Vietnamese sailors were found.
This was the second air raid by US forces in the last two days against the militants in war-torn Somalia.
North Korea's missile test likely to be high on the agenda as the UK and US leaders meet.
Nikki Haley said that the US is prepared to use 'considerable military forces' to defend itself.
A group forced their way into the chamber and threw blunt objects.
But Shadow Home Secretary Diane Abbott doesn't think the government has gone far enough.
Hamburg is bracing itself for violent anti-Trump protests.