Some airlines effectively charge parents to sit with their kids. Biden is shaming the industry into changing that.

• Biden and the White House have taken aim at the extra costs families incur to fly together.
• Airlines are heeding the Biden administration's pressure to rein in this so-called "junk fee."
• Consumer advocates want Congress to push through a law banning the practice entirely.

Airlines make billions each year by charging customers extra fees. But one fee, in particular, has become so loathed that after years of discussion, the White House is browbeating companies to stop the practice.