They called & said I need to send them money in order to get a US Federal Grant that I was awarded. I'm not sure if it's a scam, but I'd think I wouldn't have to pay money to get a grant that they say I was awarded
Did you catch a name in the call? You can try other web searches to see if there is a business name. Remember, numbers can be faked/spoofed. In general, it is best to NOT call an unknown number back. If it is a scammer, a call back from you will only get you more calls. Be Safe!