Pilots were warned of potential danger at least eight times in about 30 seconds before a Polish jet crashed in Russia in April, killing President Lech Kaczynski and about 100 others.http://feeds.feedburner.com/~ff/rss/...?d=yIl2AUoC8zA http://feeds.feedburner.com/~ff/rss/...?d=7Q72WNTAKBA http://feeds.feedburner.com/~ff/rss/...-M:V_sGLiPBpWU http://feeds.feedburner.com/~ff/rss/...?d=qj6IDK7rITs http://feeds.feedburner.com/~ff/rss/...-M:gIN9vFwOqvQ
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