Flores-Sumera, aged 45, was killed by a lone gunman as she was leaving home for work.
Since the Newtown attack by a lone gunman, Connecticut and a few other states have passed tougher gun laws.
Feinstein contended her proposal would prohibit the kind of weapon used by a lone gunman in the Connecticut shooting.
In 1995, a lone gunman shot dead Burundi's Energy and Mines Minister Ernest Kabushemeye in the nation's capital, Bujumbura.
The Judiciary Committee passed a package of gun laws proposed by Obama in the Newtown attack by a lone gunman.
CNN: Reid to force a vote Thursday on debating gun proposals
The Senate Judiciary Committee passed a package of gun laws proposed by Obama after the Newtown attack by a lone gunman.
Focus on the general risk of troubled teens, and not the specific threat of a lone gunman wandering around a school.
Then, on Dec. 11, a lone gunman shot dead Moshe Nahari, a father of nine and well-known figure in Raida's Jewish community.
Crabtree first ran across the issue following the Virginia Tech shooting, in which a lone gunman, a student, killed 32 people.
Following the Newtown shootings by a lone gunman, Obama called for a series of proposals including "universal" background checks on all gun purchases.
On Monday, the couple joined other Sandy Hook families to mark one month since the attack, which was carried out by lone gunman, Adam Lanza.
BBC: Newtown shooting: Dylan Hockley's parents recall attack
While it is not clear what motivated the lone gunman or from what disease he suffered, if any, few think he could have been right in his head.
FORBES: Billionaire Mort Zuckerman Pledges $200 Million To Mental Health Research
That night, 12 people were killed and 58 more injured when a lone gunman opened fire in a cinema in Aurora, Colorado, during a midnight screening of The Dark Knight Rises.
"What we know is that at twenty past eleven last night, Kieran was with a number of friends when he was shot at short range by what we believe was a lone gunman, " she said.
BBC: Kieran McManus shot dead outside west Belfast pizza shop
Forty years after the assassination of President John Kennedy , a poll revealed that 70% of Americans still believe that the killing was part of a wider conspiracy and not the actions of a lone gunman.
However, Pollack said the ban proposed by Obama can help reduce gun violence, especially what he called the psychologically impactful mass shootings such as the Newtown attack in which a lone gunman used a Bushmaster semi-automatic rifle.
Although the common perception is that Mr Taseer was assassinated for his outspoken views on the blasphemy law in Pakistan, it would be very short-sighted to assume that a lone gunman decided to execute him for this reason alone.
The president will make a similar appearance on Monday in Connecticut, less than four months after the Newtown attack by a lone gunman firing a semi-automatic rifle that would be prohibited under legislation under consideration in the U.S. Senate.
Installing metal detectors at movie theaters doesn't make sense -- there's no reason to think the next crazy gunman will choose a movie theater as his venue, and how effectively would a metal detector deter a lone gunman anyway?
Obama and others pushing for tougher gun laws say the December attack by a lone gunman that killed 20 first-graders and six educators at Sandy Hook Elementary School in Newtown, Connecticut, showed the need for national action against gun violence.
CNN: Obama: 'Shame on us' if Newtown doesn't bring new gun laws
For example, when a lone gunman opened fire on Christmas shoppers in a Portland Mall last December, an individual who thankfully did not realize the mall was a gun free zone stopped the killer simply by pulling his own gun and aiming it at the gunman who then inflicted a mortal wound upon himself.
That's one of a pair of major movies landing on opposite sides of the Oswald-as-lone-gunman debate due out this year.
Christian Fraser says the leaked report does not dispel French police's current working theory that the gunman was local and a "lone wolf".
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