After 50 years of missions to Mars, scientists are unlocking some of the mysteries surrounding a planet that has captivated mankind for millenniums. Will humans ever leave a boot print on Mars?
Mexican border towns, which once drew Americans looking for the 'Mexican experience,' are now desperate to bring them back amid drug violence and a recession.
Sen. John McCain's record as an immigration reformer doesn't seem to match a state that's taking a hardline stance on illegal immigration. But the senator is managing to fend off a challenge from his right ahead of Tuesday's GOP Senate primary in Arizona.