WASHINGTON (AP) — Opening a new military front in the Middle East, President Barack Obama authorized U.S. airstrikes inside Syria for the first time Wednesday night, along with expanded strikes in Iraq as part of “a steady, relentless effort” to root out Islamic State extremists and their spreading reign of terror.

“We will hunt down terrorists who threaten our country, wherever they are,” Obama declared in a prime-time address to the nation from the White House. “This is a core principle of my presidency: If you threaten America, you will find no safe haven.”