By JULIE PACE and ERICA WERNER
WASHINGTON (AP) - President Barack Obama is announcing a $500 million package of executive actions and legislative proposals aimed at reducing gun violence a month after a mass shooting in Connecticut killed 20 elementary school children.

The package includes a call on Congress to ban military-style assault weapons and high-capacity magazine and it would close loopholes in the gun sale background check system.

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Obama also is signing 23 executive actions - which require no congressional approval - including several aimed at improving access to data for background checks. A presidential memorandum will instruct the Centers for Disease Control to research causes and prevention of gun violence.

In addition, Obama will nominate Todd Jones as director of the Bureau of Alcohol, Tobacco, Firearms and Explosives. Jones currently is the acting director of the agency.

Childrens' letters to President Obama by CBSPolitics

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WASHINGTON (AP) - President Barack Obama is taking 23 executive actions aimed at curbing gun violence that don't require congressional action, including measures to encourage schools to hire police officers, increase research on gun violence and improve efforts to prosecute gun crime.

The executive actions are part of an overarching package assembled by a task force led by Vice President Joe Biden. The measures come a month after the mass shooting in Newtown, Ct., that killed 20 elementary school children.

Obama is directing the Centers for Disease Control to research gun violence and is seeking rules to ensure that law enforcement conducts background checks before returning seized firearms.

He intends to nominate Todd Jones as director of the Bureau of Alcohol, Tobacco, Firearms and Explosives. Jones is the agency's acting director.

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