Doha is the capital of Qatar. It has a population of around 1.4 million.
Dover is the capital city of the state of Delaware in the United States of America. It has a population of around 150,000.
Dubai is the largest city in the United Arab Emirates. It has a population of around 4 million.
Dublin is the capital of Ireland. It has a population of around 1.8 million.
Dushanbe is the capital of Tajikistan. It has a population of around 680,000.