This is L.

"Ah,My godness.It's hopeless."
"So,OK.This is the problem. "

（＂天啊，沒希望了。＂）
（＂好，找到問題了。＂）

BY DR.PIERS SELLERS
ASTRONAUT
DIRECTOR,EARTH SCIENCES DIVISION,NASA/GSFC
-BEFORE THE FLOOD-