What do Abraham Lincoln, zingers and pigeon soup have in common?

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Lincoln may have pioneered debate zingers.http://feeds.feedburner.com/~ff/rss/cnn_us?d=yIl2AUoC8zA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=_Erov2RSz_0:h4Ae_mhGrG8:yIl2AUoC8zA) http://feeds.feedburner.com/~ff/rss/cnn_us?d=7Q72WNTAKBA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=_Erov2RSz_0:h4Ae_mhGrG8:7Q72WNTAKBA) http://feeds.feedburner.com/~ff/rss/cnn_us?i=_Erov2RSz_0:h4Ae_mhGrG8:V_sGLiPBpWU</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=_Erov2RSz_0:h4Ae_mhGrG8:V_sGLiPBpWU) http://feeds.feedburner.com/~ff/rss/cnn_us?d=qj6IDK7rITs</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=_Erov2RSz_0:h4Ae_mhGrG8:qj6IDK7rITs) http://feeds.feedburner.com/~ff/rss/cnn_us?i=_Erov2RSz_0:h4Ae_mhGrG8:gIN9vFwOqvQ</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=_Erov2RSz_0:h4Ae_mhGrG8:gIN9vFwOqvQ)
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