An early morning explosion at an
Upper East Side Starbucks in May 2009 was determined to be unrelated to the Times Square bombing of the recruitment station. The perpetrator of the Starbucks blast, age 17 at the time of the explosion, was arrested, pleaded guilty, and was sentenced in 2010. After the bombing, investigators also revisited a separate incident that occurred on the
Canada–United States border. In February 2008, four men attempted to cross the border into
Canada from
New York. While they were being questioned by Canadian border agents, one of the men fled from the car, getting away. He left behind a backpack, inside of which pictures of New York City locations were found, including at least one picture of the Times Square recruiting center. A senior U.S. government official also told CNN that "anarchist-type material" was found in the car. Hours after the bombing,
Democratic Party members of
Capitol Hill received letters that contained the words "Happy New Year, We did it" and a picture of a man standing in front of the
Times Square recruiting center. After investigating the letters, interrogating the author, and searching his home, authorities proved that the letter was unrelated to the incident and a coincidence. The letters were sent weeks before the bombing occurred. ==Response==