1. Police are providing new details into the Virginia Tech massacre. Today they revealed that the gunman fired more than 170 rounds in nine minutes and shot himself in a classroom surrounded by victims.

2. Some residents of Spencer, Massachusetts have been hospitalized after the town's water supply was treated with too much corrosive lye. The chemical causes skin irritation and burns.

3. Republican Senator John McCain is officially running for president. He made the announcement today in New Hampshire, touting himself as the most qualified candidate to take on formidable challenges.

4. These two pandas are headed to Hong Kong as a gift from the Chinese government to celebrate the 10th anniversary of the territory's handover. Their trip starts tomorrow.

WORDS IN THE NEWS

1. corrosive: adj
A corrosive substance is able to destroy solid materials by a chemical reaction.

2. lye: n-uncount 氢氧化钠
Lye is also known as sodium hydroxide.

3. irritation
Irritation in a part of your body is a feeling of slight pain and discomfort there.

4. tout: verb
If someone touts something, they try to sell it or convince people that it is good.