Sir Tim Clark told the BBC the "stark reality of climate change is with us."
The family was on the final leg of a trip back from New Zealand.
The circumstances surrounding the incident are currently under investigation.
The Blackwater founder testified before the House Intelligence Committee.
Qatar has become a proxy fight between Iran and Saudi Arabia, with the U.S. on the sidelines.
Sheikh Mohammed bin Rashid Al Maktoum, the United Arab Emirates' prime minister and prince of Dubai, bashed Qatar in his latest Instagram verse.
Katy Perry, Miley Cyrus, Pharrell, Take That, Usher and Niall Horan will also perform at the concert, which will benefit the Manchester Emergency Fund.
Flights to five major U.S. cities are being cut.
UAE's Minister of Foreign Affairs said Trump's denial of Islamophobia is evidence enough.
The B777-300 was carrying 300 passengers and crew. A firefighter died in the incident.
The Frenchman is yet to make a signing in this transfer window.
Damage to a plane is consistent with small-arms fire, officials say.
The Emirate is operating a contradictory policy towards extremists - sheltering Islamist groups while participating in U.S.-led airstrikes on Islamic State targets