I don't know anything about hawks (I'm not even sure there are any in Alaska) but we've had problems with eagles. Also, Princess Kuhio was dive-bombed by an owl once! She managed to run under the car before it could get her. We were too far away to have been any help at all. We learned our lesson (thankfully before it was too late). The following is from a 1993 newspaper article:

Eagle Snatches Dog While Owner Watches
Valdez, Alaska -- A bald eagle satisfied its hunger at a Valdez gas station when it snatched up a small dog and flew away, leaving the dog's owner screaming in horror.

The chihuahua-like dog had been let out of a motor home to run around in the station's parking lot while the owners, an unidentified couple from Georgia, cleaned the vehicle's windshield.

Witnesses said the pet was about 5 feet away from the RV when the eagle swooped down from a perch in a nearby tree. Before the owners could react, the eagle circled up and away, heading off toward the city's harbor clinching the pooch tightly.

"It was the damnedest thing I ever saw," said Dennis Fleming, a gas station attendant. "The dog gave one yelp and that was it."

The woman owner clutched her hands to her face and cried, "Oh, my God," while Fleming tried to console her.