On April 15, 2013 (March 6, 2013 in the lunar calendar), a terrorist explosion occurred in Boston, USA. On April 15, 2013, at least two explosions occurred near the finish line of the Boston Marathon in the United States, killing at least two people and injuring nearly a hundred others. The explosion occurred at about 2:50 pm on the 15th (2:50 am Beijing time on the 16th). A police statement said the explosion currently killed two people. According to the Boston Globe, a media site where the explosion was located, about 90 people were being treated in hospitals in Boston. The injury of the injured is still unclear for the time being. Other media such as the Associated Press currently say the explosion injured more than 60 people. Multiple witnesses have now confirmed that at least two explosions occurred at the scene, when people were cheering and applauding contestants preparing to sprint to the finish line. Multiple videos showed smoke billowing from the marathon venue after the explosion. Steve Silva, a reporter for the Boston Globe at the scene, said that the injured were being carried away from the scene on stretchers. There were blood everywhere. Some people had their legs broken and many people were crying. U.S. law enforcement officials told the Associated Press that the local mobile phone communication system had been urgently shut down to prevent someone from remotely exploding bombs via mobile phones. U.S. President Barack Obama said on the 16th that the Boston Marathon bomb attack was a despicable "act of terrorism." "Using bombs against innocent civilians at all times is an act of terrorism," he said. This is the first time Obama has used terrorism to describe the Boston bombings. Faced with the reality that terrorism has returned to the United States, the 11 years of general calm after the 9/11 attacks have come to an end. This was the first terrorist attack on U.S. soil in 11 years. Although the scale cannot be compared with the terrorist attacks planned by al-Qaida in 2001, the Boston bombings once again made people realize that the United States is not out of reach of terrorism. Although thousands of U.S. soldiers have died overseas since 2001, the United States has hardly experienced major terrorist incidents. Comments: It is regrettable that the United States adheres to "double standards" in counter-terrorism!