Why airline seats have to go up ahead of take-off and landing

[ahlam1399]

http://img-s-msn-com.akamaized.net/tenant/amp/entityid/BBqkUUF.img?h=100&w=100&m=6&q=60&o=f&l=f&x=1085&y=795Airplane seats only recline slightly, which might make it seem strange when passengers are ordered to ensure their seats are in an upright position for take-off.

أكثر... (http://www.msn.com/en-in/travel/tripideas/why-airline-seats-have-to-go-up-ahead-of-take-off-and-landing/ar-BBqmNQN?srcref=rss)