PHILADELPHIA--(BUSINESS WIRE)--The United States faces an expected shortfall of $1.6 trillion in needed infrastructure spending through 2020, reports the American Society of Civil Engineers1. This expectation is leading state and local governments to increasingly turn to public-private partnerships, known as P3s, to help meet critical infrastructure needs without having to raise taxes or increase debt loads. ACE Group today released an advisory that examines the exposures and complex insurance