Driver of Utah tour bus that crashed was on his first trip with company

1. 3.casualty

1.1. four Chinese traveller

1.2. 22 injured

1.3. 12 still hospitalized

2. 5.accident

2.1. Sept. 20th, 2019

2.2. Utah Highway 12

2.3. Bryce Canyon National Park

3. 4.volunteer

3.1. Taiwan student

3.2. manager from Bryce Canyon

4. 1.company

4.1. new company

4.2. driver

4.2.1. first trip

4.3. new bus

5. 2.investigation

5.1. starts

5.2. not clear