The Washington Nationals announced that they will beef up security for this weekend's games against the Houston Astros since Sunday marks the 10-year anniversary of the Sept. 11, 2001 terrorist attacks. (AP Photo/Nick Wass)

Photo by: Nick Wass

The Washington Nationals announced that they will beef up security for this weekend's games against the Houston Astros since Sunday marks the 10-year anniversary of the Sept. 11, 2001 terrorist attacks. (AP Photo/Nick Wass)