'Ambush' killings of lawmen part of increase in slain police

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They're often called "ambush" killings.http://feeds.feedburner.com/~ff/rss/cnn_us?d=yIl2AUoC8zA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=A_BgohYw56k:xVd1Smgc750:yIl2AUoC8zA) http://feeds.feedburner.com/~ff/rss/cnn_us?d=7Q72WNTAKBA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=A_BgohYw56k:xVd1Smgc750:7Q72WNTAKBA) http://feeds.feedburner.com/~ff/rss/cnn_us?i=A_BgohYw56k:xVd1Smgc750:V_sGLiPBpWU</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=A_BgohYw56k:xVd1Smgc750:V_sGLiPBpWU) http://feeds.feedburner.com/~ff/rss/cnn_us?d=qj6IDK7rITs</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=A_BgohYw56k:xVd1Smgc750:qj6IDK7rITs) http://feeds.feedburner.com/~ff/rss/cnn_us?i=A_BgohYw56k:xVd1Smgc750:gIN9vFwOqvQ</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=A_BgohYw56k:xVd1Smgc750:gIN9vFwOqvQ)
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