
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given that $F_{1}$ and $F_{2}$ are the two foci of the hyperbola $x^{2}- \frac {y^{2}}{a^{2}}=1(a > 0)$, and $O$ is the origin, the circle $O$ has a diameter formed by $F_{1}$ and $F_{2}$. The line $l$: $y= \sqrt {7}x-4$ intersects with the circle $O$. Determine the range of the real number $a$.

Present the answer in LaTex format: \boxed{Your answer}
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