The Race2Recovery team is trying to complete the Dakar Rally to raise funds for Help for Heros.
The charity is raising funds for the Tedworth House recovery and rehabilitation centre in Wiltshire.
The two US Marines involved with the race are also raising funds for the Heros Project which supports injured service men and women in America.
More top news
Flooding continues to make headlines on Thursday.
Some of these showers will be heavy with hail and thunder, and wintry across the north.
Bloomberg is the late entry in the Democratic nomination battle, fuelled by his almost limitless money.