Iranian President Mahmoud Ahmadinejad says the threat of sanctions because of the country's nuclear program only makes Iran more determined to pursue its nuclear program. <br/><br/>Ahmadinejad said international pressure on Iran can not stop the Islamic Republic's progress and the motivation of its people. He made the comments during a televised speech in the southern Iranian city of Sirjan today.<br/><br/>Ahmadinejad said President Barak Obama had failed to usher any real change in U.S. policy toward Iran, despite his pledges of increased engagement. <br/><br/>During his speech, President Ahmadinejad also warned Israel against launching another military action in the Gaza Strip, saying such aggression will cost Israel a great deal.<br/>