Allegheny County Executive Rich Fitzgerald, Pittsburgh Mayor Bill Peduto and Allegheny Conference on Community Development CEO Stefani Pashman addressed reporters at a news conference Thursday after Amazon announced 20 potential cities from the 238 that submitted proposals for its HQ2. Fitzgerald told reporters it was a proud day for the region. “What I’m so proud about, when you think about where we’ve come (from) over the last few decades, when 238 cities, major cities in North America,…