Yes.

The First Amendment permits you to use the seal of a government agency to illustrate a story about that government agency. The government can no more prohibit you from displaying its seals for expressive purposes than it can prohibit you from displaying its flag.

The questions raised about possible trademark violations and implied endorsement are red herrings. Section 2(b) of the Lanham Act prohibits registering a trademark that "consists of or comprises the flag or coat of arms or other insignia of the United States, or of any State or municipality," so the government therefore may not trademark its seals. In re City of Houston, 731 F.3d 1326, 1331 (Fed. Cir. 2013) ("As the nature of the mark is not disputed in this appeal — Houston admits that its city seal is an insignia under § 2(b) of the Lanham Act — the Board properly affirmed the examining attorney's refusal to register Houston's city seal.")

Even if the seal were a protected trademark, the context of its use -- in an editorial setting rather than for commercial purposes -- is protected by the First Amendment. Renna v. Cty. of Union, N.J., 88 F. Supp. 3d 310, 323 (D.N.J. 2014) ("Consider that the First Amendment prohibits a State from criminalizing the desecration of the United States flag as a form of political protest. ... Should a county, by means of an artful extension of trademark law, be permitted to quash political expression that uses its Seal? I think such an extension would be both unwarranted and Constitutionally risky.").

The same is true of implied endorsements. The First Amendment does not permit the government to limit your expression because it thinks people might mistake it for government speech.

For instance, Rothamel v. Fluvanna Cty., 810 F. Supp. 2d 771 (W.D. Va. 2011), a county government adopted a law "prohibiting the display of the Fluvanna County seal unless expressly authorized by the Fluvanna County Board of Supervisors." The law was prompted by concerns about a blogger who had been using the county's seal in stories about county government, and there were reports that some people thought the seal indicated that the stories were official county publications. When a blogger challenged the law, the federal court entered a permanent injunction against enforcing it:

The County takes the position that the showing of the seal by private citizens is not a form of expression at all; rather, the seal is government property, like a government vehicle or other form of personal property. ... While the County is correct that Rothamel does not have the right to take possession of a physical seal owned by the County, the County cannot control all privately-owned images or representations of the seal simply by declaring an interest in managing its own property. The First Amendment requires a more specific and substantial interest in restricting speech than the broad desire to safeguard government property.