HARARE (Reuters) - Zimbabwean President Emmerson Mnangagwa appointed retired army boss Constantino Chiwenga and veteran politician Kembo Mohadi as the ruling party s vice presidents, a spokesperson said on Saturday. The appointments paved the way for the two to ascend to similar positions in government, officials said. Mnangagwa, who took over last month from 93-year-old Robert Mugabe after the intervention of the military, is under pressure from opposition parties and the public to implement political reforms.  Under Mugabe s 37-year rule political space was limited, with the latter part of his reign marked by the emergence of a ZANU-PF faction aligned to his wife Grace that threatened to usurp the army s central role in government. Chiwenga, who retired from the army on Monday, is the latest in a string of senior military figures appointed by Mnangagwa to important political posts.  Presidential spokesman George Charamba said Chiwenga and Mohadi s appointments as vice presidents of the country could only be made by the Chief Secretary to the Government and Cabinet, Misheck Sibanda, who is out of the country. 