Deadly terror attacks in Brussels on Tuesday have sparked calls for expanded security in the crowded areas around airports in the U.S., protecting human lives at any cost.
While it's impossible to truly value safety, does the U.S need to spend to expand airport security to the level of other countries? How much would it cost and who would pay for it?
In some countries, like Israel and Turkey, transportation to and from airports faces similar scrutiny to boarding areas. But in most U.S. airports, security starts well inside airports, leaving trains, shuttles, lobbies and parking lots less secure, experts said.