Leaders of the Senate Commerce Committee on Monday introduced a bipartisan aviation policy bill that would boost runway safety, track high-altitude balloons and prohibit airlines from charging fees for families to sit together. Senate Commerce Committee Chair Maria Cantwell, a Democrat, top Republican Ted Cruz and the aviation subcommittee leaders — Senators Tammy Duckworth and Jerry Moran — proposed a $107 billion five-year Federal Aviation Administration (FAA) reauthorization bill. The committee will take up the bill on Thursday, while a House panel will consider its version on Tuesday and Wednesday. Cantwell said the bill "sets the first-ever clear ticket refund…