Mexico's president left on a six-day trip to China and Australia amid angry protests over the suspected massacre of 43 college students by a gang allied with corrupt police.
The Ebola epidemic is "the most serious international public health emergency in recent years," British, US, French, German and Italian leaders agreed.
People around the world will celebrate "Mandela Day" Friday for the first time since the iconic South African leader's death by doing good deeds on what would have been his 96th birthday.
EU leaders failed to reach agreement as their summit ended early Thursday over who should get the top jobs to steer the 28-nation bloc over the next five years.
The Syrian National Coalition, the main exiled opposition group seeking the overthrow of Bashar al-Assad, elected Saudi-based Syrian opposition figure Hadi el-Bahra as its new president.
A visibly limping Kim Jong-Un presided over an official memorial in Pyongyang on Tuesday for the 20th anniversary of the death of his grandfather and North Korea's founder, Kim Il-Sung.
Jean-Claude Juncker has been named as the next president of the European Commission with backing from most EU leaders, dealing a bitter blow to opponent David Cameron and threatening to increase the chances of Britain leaving the bloc.
North Korean leader Kim Jong-Un paid respects to his grandfather Kim Il-Sung as the country marked the birthday Tuesday of its late founder with renewed calls for loyalty to the ruling Kim dynasty.