Portal:United States/Did you know/26

== Source ==
 * ... that during his 1838 Lyceum address, Abraham Lincoln (pictured) warned of a tyrant overtaking the United States from within?
 * ... that Perry Greeley Holden was the first professor of agronomy in the United States?
 * ... that only 6% of Pacific hurricanes make landfall on the United States, and that the state of Arizona is affected by a tropical cyclone only about once every five years?
 * 1) Recent_additions/2012/February
 * 2) Recent additions/2006/March
 * 3) Recent additions/2006/March