Colleague Rina van der Ende said the news was still difficult to comprehend.

BBC: UK charity worker killed in Kabul

Replacing Katrina and the other retirees in 2011 will be Don, Katia, Rina, Sean and Whitney, according to an NOAA news release.

CNN: No more Hurricane Katrinas

Brendan Craig is here, and his dad. (Applause.) And also Rina Castaneda and her mom. (Applause.) Let me just say, they represented you really well.

WHITEHOUSE: President Obama Speaks on College Affordability