March 23 (Reuters) - The following are the top stories in the Wall Street Journal. Reuters has not verified these stories and does not vouch for their accuracy.

- An Air Canada AC.TO Express plane collided late Sunday with an emergency vehicle at LaGuardia Airport in New York City, and the Federal Aviation Administration said the airport would be closed until Monday evening.

- Meta META.O Chief Executive Mark Zuckerberg is building a CEO agent to help him do his job. Another AI tool called Second Brain, which can index and query documents for projects, among other things, is also gaining momentum internally.

- Activist investor Elliott Investment Management has built a multibillion-dollar investment in electronic design automation company Synopsys SNPS.O, arguing the software company has room to boost sales and improve margins.

- Elon Musk said Tesla TSLA.O and SpaceX will team up to build a massive new chip factory in Austin, Texas, to support his far-reaching plans for artificial intelligence, robots and human settlements in space.

(Compiled by Bengaluru newsroom)

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