US and Iran issue fresh threats as they resume strikes, fighting for control of Strait of Hormuz

The US and Iran are ramping up their fight for control of the Strait of Hormuz. A series of attacks along the waterway has threatened to derail a fragile ceasefire. Iran's parliament speaker accused the US and its allies of undermining maritime security. He stressed Tehran will not give up control of the vital waterway. Toni Waterman and Blake Sifton with more.