From Celebration to Commemoration
After the Khmer New Year celebrations:

CAMBODIA. Phnom Penh. 14/04/2009: Celebration of the year 2553 at Wat Ounalon, the Year of the Ox.
It is back to commemorations: on April 17th, 34 years ago, the Khmer Rouge took Phnom Penh…

CAMBODIA. Chhoeung Ek (Phnom Penh). 17/04/2009: Fall of Phnom Penh to the Khmer Rouge commemoration by some 500 followers of the Sam Rainsy party at the Chhoeung Ek Memorial.
There is a small multimedia slideshow on Khmer New Year here at Ka-set.