President Trump on Saturday refused to endorse a global climate change accord during the summit with international leaders, saying he needed more time.
President Trump is now facing scrutiny about son-in-law Jared Kushner's reported contact with Russian officials before the election.
British Airways suffered a major global system outage that has forced it to suspend flights until later Saturday, causing major delays.
Clinton's implicit comparisons between Nixon and the Trump-Russia investigation drew the loud cheers from graduates.
Britain lowered its terror threat level to "severe" after raids by police investigating the Manchester Ariana Grande concert bombing.