Southwest Airlines, which used to let passengers choose seats at boarding, has announced several changes in recent months, including assigned seats and new fees for checked bags. Because of that, they are changing the interiors of their planes to accommodate the new seating plans and give travelers more overhead bin space. CBS News Senior Transportation correspondent Kris Van Cleave got a first look at a new Southwest plane — here’s what has changed.

The Missouri Department of Transportation (MoDOT) has taken accountability after admitting that crews were not able to salt the roads in time, as the winter storm arrived earlier than originally forecasted. Snow was expected to begin falling around 4 p.m., but instead started around noon, catching both MoDOT and drivers off guard. MoDOT had planned to begin salting in the afternoon, but by the time trucks were deployed, several roads had already become dangerously slick, leading to multiple acci

Euler's Method in MATLAB

Vogel approximation method with dummy variables

Transportation Problem | VAM Method | Vogel's Approximation method