The standards for determining employment discrimination under the Rehabilitation Act are the same as those used in title I of the Americans with Disabilities Act. Section 501 Section 501 requires affirmative action and nondiscrimination in employment by Federal agencies of the executive branch.
The speed depends on the aircraft type and also on the weight of the aircraft. The more load it is carrying, the faster it needs to travel to land safely. Typically, an airliner will be travelling at 120mph or faster as it lands. A 747 will usually be moving faster than a smaller passenger plane - in the region of 150mph or more. Concorde, designed for extreme speed needs to be travelling faster still. the design that helps it travel so fast also means that it needs to land at higher speeds than all other airliners. Light aircraft will typically be landing at a speed of below 100mph. It varies - depending on the plane.
A stall does not stop an airplane while in the air. Stalls typically occur around 40 to 60 MPH (depending on aircraft) and will cause the plane to nose forward and gain speed again (if proper weight and balance has been maintained). In extended climbs in my Mooney, I have seen ground speeds under 10 MPH in the climb.