ROME (Reuters) – Brokering a deal on a safe zone around Ukraine’s Russian-controlled Zaporizhzhia nuclear power plant is getting harder because of the involvement of the military in talks, the head of the U.N. nuclear watchdog said on Wednesday. The Soviet-era plant, Europe’s largest, was captured by Russian forces in March, soon after their invasion of Ukraine. It has repeatedly come under fire in recent months, raising fears of a nuclear disaster. “I don’t believe that (an agreement) is impossible, but it is not an easy negotiation,” International Atomic Energy Agency (IAEA) Director General…