Sheikh Mohammed bin Rashid, Vice President and Ruler of Dubai, and Sheikh Mohamed bin Zayed, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the UAE Armed Forces, sign a piece of the Hope Probe, which will be launched to Mars in July, at Qasr Al Watan on January 6. Hamad Al Kaabi / Ministry of Presidential Affairs

2020 in review: Sheikh Mohammed bin Rashid's key moments – in pictures