DUBAI, United Arab Emirates (AP) — The United States has expanded its airstrike campaign against Iran by hitting more bridges and collapsing a tower at a key Iranian port. The latest strikes early Friday are part of U.S. President Donald Trump’s threats to start striking infrastructure to pressure Tehran to ease its chokehold on the Strait of Hormuz. Iran also launched new missile attacks against U.S.-allied nations in the Middle East, including Qatar, a key mediator in the war. The interim ceasefire agreed to last month has collapsed, and the region has endured days of back-and-forth attacks by the U.S. and Iran as they battle for control of the strait. Iran reported new casualties in Friday’s strikes.