With regard to the post “United Muslim Army is the answer” (Apr. 22), there is a need for not only a common army, but also a common economic block and for joint Muslim research and development projects. Nowadays, many of the wars being fought in the world are economic. As Muslims, we should be leaders in modern research and technology. We have all the necessary resources; we must initiate the projects as soon as possible. Malik Asad Mahmood, Online response I agree that a United Muslim Army should have equal representation from every Muslim country, and that its chief should be selected every two years on a rotating basis, so that everyone has an equal opportunity to head this organization. The headquarters of this force should be in Saudi Arabia as it is the center of the Muslim world. An Expat, Online response