NEW YORK, April 30 (Reuters) - The New York Times reported the following stories on its front page on Monday. Reuters has not verified these stories and does not vouch for their accuracy. --- Animal feed produced in China has been regularly supplemented with a cheap additive that is at the center of a pet food recall. --- Iran announced that it would attend regional talks on Iraq strife. --- U.S. Sen. Barack Obama's campaign has put a strain on the close relationship he forged over 20 years with his pastor. --- President Bush's national security adviser is interviewing candidates for a new high-profile job people in Washington are calling the war czar. --- Maine has not come close to its goal of covering an estimated 130,000 residents without insurance. --- Schools are deploying Dance Dance Revolution as the latest weapon in the battle against childhood obesity. ---