The exterior of Poland's Parliament in Warsaw is seen here on Nov. 20, 2012. Authorities arrested a 45-year-old chemist who was planning to detonate some four tons of explosives in front of the building while President Bronislaw Komorowski, Prime Minister Donald Tusk, Cabinet members and lawmakers were inside. (Associated Press)

Photo by: Czarek Sokolowski

The exterior of Poland's Parliament in Warsaw is seen here on Nov. 20, 2012. Authorities arrested a 45-year-old chemist who was planning to detonate some four tons of explosives in front of the building while President Bronislaw Komorowski, Prime Minister Donald Tusk, Cabinet members and lawmakers were inside. (Associated Press)