The airstrikes came just hours after an attack killed and wounded American and British servicemen at a base north of Baghdad.
The attack targeted the Iranian-backed Shia militia in Iraq, marking a major escalation in U.S.-Iran tensions.
The speech offers a preview of how the progressive senator will battle the moderate in a two-person race.
President Donald Trump initially said no Americans were injured in the retaliatory missile strikes on Al-Asad air base in Iraq.
Hundreds of anti-government demonstrators flooded the streets of Baghdad and Iraq's southern provinces on Sunday.
The Pentagon announced that 34 U.S. troops have been diagnosed with traumatic brain injuries after the Iranian missile strike.
The Iranian strike took place Jan. 8 on an air base in Iraq.
The "million-man" march was called for by an influential Shiite cleric, though their numbers fell short of a million.
Soleimani thought he was untouchable, and for more than a decade he was.
At least 11 U.S. service members were airlifted out of Iraq following Iran's missile strikes on the Ain al-Asad air base.
Iran initially denied that a missile downed the Ukrainian airliner for days.
The request comes after Iraqi lawmakers passed a non-binding resolution to oust U.S. troops following a strike that killed top Iranian general Qassem Soleimani.
The president addressed the nation for the first time since ordering the killing of Iran's top general last week.
“It’s so freaking weird, I can’t even believe it," the MSNBC host told Seth Meyers on "Late Night."
Iran fired a barrage of missiles in the name of Qassem Soleimani, a top military leader assassinated by the United States.
The flight restrictions, which included airspace over the Persian Gulf and Gulf of Oman, came after Iran launched an attack on military bases in Iraq.
In the wake of a U.S. drone attack in Baghdad, Cardinal Louis Raphael Sako warned that “innocent people” will bear the cost of the heightened tensions.
The strike on the al-Asad and Erbil bases represent the first known retaliation to Trump's killing of an Iranian commander. Reportedly no Americans were killed.
“This is state terrorism,” Zarif said of the killing of Qassem Soleimani, commander of Iran's Revolutionary Guard’s Quds Force.