A motive may never be known. "Whilst the attack lasted only 82 seconds it will remain in the memories of many forever," police said.
The gunman had barricaded himself in a bus for hours and a section of the tourist destination was closed. Police said he opened fire without warning.
A recent survey found that applications from foreign students to U.S. schools are down nearly 40 percent this year.
Senior military and defense officials are investigating reports a U.S. airstrike killed scores of civilians in Iraq.
China's rulers are planning for the world's biggest megacity with an estimated population of 130 million and the size of New England.