Livingston, Mont. • A single-engine airplane crashed in the northern part of Yellowstone National Park on Monday morning, seriously injuring the 54-year-old pilot, park officials said.
Gardiner resident Bill Hill told the Livingston Enterprise (http://bit.ly/1h0QcBu ) he heard a plane's engine struggling at about 8:30 a.m.
"I heard a really loud propeller noise," Hill said. "I looked out and saw a plane headed toward the ground at a weird angle, and I knew it must have crashed."