What is the "Iron Dome?"

It's a nickname for an antimissile system built by Israel with help from U.S. funding, and it came to the world's attention this week because it's being engaged to protect President Obama while he's visiting. Israel said the system, which uses missiles to shoot down incoming warheads, has brought down 421 missiles so far and missed 58, giving it an 84 percent success rate. Some military analysts dispute the success, saying it's probably much lower.

Who is Guccifer?

The anonymous hacker over the last few weeks has been accessing the email and Facebook accounts of top U.S. officials and business leaders. Victims include former President George W. Bush and former Secretary of State Colin Powell. Guccifer made public some of Bush's amateur paintings of animals and wrote anti-Bush statements on Powell's Facebook page. Guccifer's identity remains a mystery.

Is Colt's planning to leave Connecticut?

Colt's Manufacturing, a legendary gun producer established in Connecticut in 1836 by Samuel Colt, is considering leaving the state as a result of the restrictive gun laws under consideration by the legislature in the wake of the Sandy Hook Elementary School massacre. President and CEO Dennis Veilleux told Fox News that the company, with 700 employees, was feeling unwelcome as a result of the law changes being pondered. Proposed laws being pushed by Gov. Dannel Malloy include an expanded assault weapons ban, ammunition restrictions and a prohibition on bulk purchases of handguns.