Washington (AFP) – A bridge collapsed early Friday in Pittsburgh, hours before US President Joe Biden was due in the city to give a speech touting his $1-trillion plan to fix America’s worn-out infrastructure. Pittsburgh’s public safety authorities tweeted that three people were hospitalized with non-life-threatening injuries after the road bridge buckled into a snowy ravine. The otherwise minor accident immediately caught national attention because Biden was set to touch down in the industrial city shortly for a speech promoting his efforts to reset the post-pandemic US economy, including thr…