ADDIS ABABA (Reuters) - Missile strikes on two Ethiopian sites were in retaliation for recent air strikes by the federal government on the northern Tigray region, and they targeted military bases, Tigray’s state government said on Saturday. The airport in Gondar in Amhara state, which neighbours Tigray, was damaged on Friday by what the government called rocket fire. Another rocket aimed at the Bahir Dar airport missed the target, the government said.