"We completely reject the suggestion this had anything to do with race," Qantas said in a statement.
The gunman had been married to the woman he killed, and the man fatally shot is believed to have been dating her, police said.
Nonetheless, the U.S. is holding far more children than are other countries for which the U.N. has reliable figures.
The beloved panda has lived at the National Zoo since he was born, but today he took off on a 16-hour flight to China as part of an agreement between the two countries to assist in conservation efforts.
The move comes after a Southwest Airlines passenger died last year when a fan blade on a 737-engine broke off mid-flight, partially sucking her out of a passenger window.