US Dept. of the Interior: Cherry Blossoms Hit Peak Bloom Washington D.C.'s world-famous cherry blossoms will be at their peak bloom through this weekend. Under ideal conditions they can hold their blossoms for up to two weeks. Find out more here.Learn more:* asia.si.edu: Celebrate the National Cherry Blossom Festival with the National Museum of Asian Art * NPS.gov: Cherry Blossom Festival * si.edu: Cherry Blossoms * USCIS: A More Perfect Union: The USCIS Civics Test Guide to the Monuments and Memorials on the National Mall (13 memorials and pdfs)