It's the fifth day of the Israel-Iran conflict. The two countries have continued to exchange missile attacks following Israel's initial salvo on Friday. Russia has condemned the "dangerous" escalation of tensions between Iran and Israel. U.S. President Donald Trump has warned residents in Iran's capital, Tehran, to evacuate immediately. Professor Wang Jin, director of the Center of Strategic Studies at Northwest University in Xi'an, says Trump aims to put new pressure on Iran to force it to accept terms and give up its nuclear capabilities.